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1809 1586 1165 564 7060 2600 A conchoidal fracture English author name string: Óðinn Wikimedia username: Óðinn object of statement has role: photographer...

Please select "one" of your favorite license. 1575 335 694 976 4432 3674 Conchoidal fracture. It's typical for glass materials. English A large sample of...

of this work, hereby publish it under the following license: English Conchoidal transform Russian Конхоидное преобразование author name string: Matsievsky...

of this work, hereby publish it under the following license: English Conchoidal transform Russian Конхоидное преобразование author name string: Matsievsky...

of this work, hereby publish it under the following license: English Conchoidal transform Russian Конхоидное преобразование author name string: Matsievsky...

of this work, hereby publish it under the following license: English Conchoidal transform Russian Конхоидное преобразование author name string: Matsievsky...

07:31 Tchenguise 1417×1063× (481356 bytes) {{Information |Description=Conchoidal fracture glass |Source=self-made |Date=January 2008 |Location= |Author=A...

0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue English Obsidian with conchoidal fractures Simplified Chinese 黑曜石 Bangla অবসিডিয়ান...

Français : Le verre a une cassure de type conchoïdale English: Glass with a conchoidal fracture I, the copyright holder of this work, hereby publish it under...

DescriptionConchoidal.JPG cassure conchoidale English: Conchoidal fracture, illustrated by the broken surface on a piece of obsidian (volcanic glass)....

Description2017-Obsidian-conchoidal-fracture.jpg English: Conchoidal fracture, Obsidian from Armenia Date 18 March 2018, 12:24:18 Source Own work Author...

EQUATIONS to a conchoidal surface in respect to systems of polar and of rectangular coordinates. To determinethe Volume of a ConchoidalSolid. Suppose the...

DescriptionConchoidal fractures in a cliff wall. (9631055250).jpg (NPS photo by Neal Herbert) Date 28 August 2013, 12:33 Source Conchoidal fractures in...

generally found sometimes almost compact, LEAD ORES 8 yielding a flat conchoidal fracture with little lustre. It is very widely distributed in most countries...

Cleavage parallel with octahedral faces, smooth, but interrupted. Frac. conchoidal to uneven. Surface smooth and splendent. SemiLustransparent, to translucent...

is rough and dull. Internally it is glimIts fradJure is between flat conchoidal mering. Its fragments are indetermiand fplintery. It is very flightly...

with shale, fireclay. Coal (top bed) bright; hard; compact; fracture conchoidal Contains thin seams of carbonate of lime in both the ver; layers thick...

Properties. 0 to 2. when Opaque. shale. Lustre from Fracture conchoidal. Hardness 3 pretty hard, 2.815. Specific gravity, to 7. Surface smooth...

forms are described as uneven, yielding a rough or irregular surface; conchoidal, breaking with curved surfaces, often with concentric markings like ...

Pr -I- cr. rather • perfect, though inter.. rupted. Fracture imperfect conchoidal. Surface rough. — Lustre metallic. Colour blackish lead-grey. Streak unchanged...

surface of the ground, consists of heavilybedd.ed drab shales, with a conchoidal fracture, and is totally destitute of fossils. The upper half has been...

Siderite, or quartz of a blue colour. It exhibits the greasy lustre and conchoidal fracture of common quartz. 30. Siderite. ceding. This specimen is quite...

Ammoniac. 1. Octahedral Sal Ammoniac, 1st Subsp. Volcanic Sal Ammoniac, 2d- Conchoidal Sal Ammoniac, * Mascagnine, or Sulphat of Ammonia, - 11 12 14> 16 Genus...

7. Pr (P) 1. Pr. 9. perfect, though inter- Fracture imperfect conchoidal. Surface rough. Lustre metallic. Colour blackish lead-grey. Streak unchanged...

often dividing into columnar, cubical, or rhomboidal fragments. Fracture conchoidal, uneven. Rather brittle and sectile. Lustre vitreoresinous. Colour black...

planes of one rhombohedron, bat imperfect. Frac- H.=7. S.G.=2-5 ture conchoidal to uneven and splintery. 2*8. Colourless and hmpid, or yariously coloured...

accord- ing to the planes pf one rhombohedron, but imperfect. Fracture conchoidal to uneven and splintery. 2 '8. Colourless varieties. H.=7. S.G.=2'5 ...

Precious Serpentine, 297 /3. Conchoidal Precious Serpentine, 298 6. Fullers Earth, - - 300 1st Subsp. Conchoidal Copper Green, 305 2d — Earthy...

ordinary oblong flint nodule be broken across in the middle, the fracture is conchoidal or shell-shaped, and if one of the portions of that flint were set on...

the general surface of the ground, consists of heavilyshales, with a conchoidal fracture, and is totally destitute of bedded drab fossils. The upper...

confusedly fibrous, often dividing into columnar, cubical, or rhomboidal conchoidal, uneven. rcsinous. Rather brittle Colour black, brown. and fragments...

with ihale, fireclay. Coal (top bed) bright; hard; compact; fracture conchoidal Contains thin seams of carbonate of lime in both the ver- ; layers thick...

burning with a long flame. Color, in- tense black. Coals hard, break with conchoidal fracture (splint coal). Specific gravity, 1.25. Yields 50 to 60 per ...

stable form, that of marcasite, is produced. Cleavage indistinct; fracture conchoidal; brittle; hardness 6; specific gravity 4.9 to By mixture with quartz or...

other at right angles : the transverse fracture is imperfect and minute conchoidal. The fragments are cubical. It sometimes exhibits con distinct slender...

surrounding clays are wanting. It breaks with up into blocks by a clean conchoidal fracture, showing a light buff surface mottled by greenish gray lenticular...

utility, I would say, that some specimens appear to approach nearest to the Conchoidal brown Coal of the Wernerians, were it not for the obvious srbsurdity of...

accord­ ing to the planes of one rhombohedron, but imperfect. Frac­ ture conchoidal to uneven and splintery. H .= 7 . S.Gr.=2’5— 2’8. Colourless and limpid...

Sectile to Brittle Amorphous Compact to Slaty 2.75 Brittle Amorphous Conchoidal lilast. Black Minerals. 5.5 chemical uses. Brittle (?) Compact ...

yellowish colour, transparent, usually coated with dust, and having a conchoidal fracture. It is not so hard as copal, but is still what may be termed...

hornstone, eurite, &c., had of more or less compact texture, often with conchoidal fracture, having approximately the hardness and fusibility of felspars...

coals, burning with a long flame. Color, in- Coals hard, break with conchoidal fracture tense black. Yields 50 to 60 per Evaporative cent pulverulent...

from PRECIOUS STONES. 12 When the form of fracture of concave conchoidal it is known is and convex surfaces when ; free composed and when...

to crystalline quartz. fracture and hard enough When the fracture is conchoidal the mineral cision these typical substances, I. Jasper. —Opaque, with...

there can be no doubt; the pieces are co-adapted by similar smooth conchoidal surfaces, and then* Two general appearance is same. the of the pieces...

Color brown to reddish-brown. Streak greenish-gray. Translucent. Fracture conchoidal. Analysis, G-. vom Rath (1. c.) : . Si 51 Fe Mg 49*8 5 05 25 6...

often grayish, greenish, brownish-white. Fracture uneven to imperfectly conchoidal. Streak, Brittle. Smithsonite does not occur in large quantities, as...

5. Dry burning with a long flame. Color, inCoals hard, break with conchoidal fracture Yields 50 to 60 per Specific gravity, 1.25. coals, tense black...

Silver-Ore, 58 Earthy Silver-Glance, 72 6. Corneous Silver-Ore, or Conchoidal Corneous Silver-Ore, ib. Radiated Corneous Sil¬ 62 ver-Ore, 74...

slate. 60. White conchoidal chert. Well fitted for paving 61. flint mills. in metallic veins. Old Secondary formations. Grey conchoidal chert. 62....

Neolithic conchoidal flake (drawing) Photographer Finder, Anna Tyacke, 2006-01-08 23:35:08 Title Neolithic conchoidal flake (drawing) Description English:...

by a dull the knife to of partly and indicative of being a conchoidal other the action showing partly up; the shining minute from separated...

Blainville ears,' and also excessive length of ears. implantation marked conchoidal The Morel ear. of ears; shape. too PETERSON: THE STIGMATA OF DEGENERATION...

rates of penetration (Fig. 13a). The second type of crack (Fig. 13b) was conchoidal or irregularly curved, as opposed to the typically flat form mentioned...

fracture scarcely scratches not to be fused small grained quartz ; and conchoidal rather brittle by the blowpipe. and frangible; Spec. Grav. 3.28G1...

fracture. Quartz is one example, breaking, as it does, with a shell-like (conchoidal) frac- _ CRYSTAL OF QUARTZ. It of hexagonal purest form the mineral...

mineral when freshly fractured across the line of cleavage or lamination. Conchoidal fracture is when the surfaces are roughly curved into concave and convex...

brilliantjet blackcolour, of high resinous lustre; fracture perfectly conchoidal and brilliant. Hardness between one and two of Mohs' scale. Density 1'097...

broken and the specimen removed . Such specimens exhibited the typical conchoidal fractures characteristic of gln.sses and were soluble in carbon disulfide...

copper, : Lustre, metallic. Opaque. Cubic cleavage imperfect. Fracture, conchoidal. Sectile. Hardness, 2 to 2j. Den- grey. sity, 7 to 7-4. Fusibility...

somewhat conchoidal fracture. , In the CoppEK-MiNE Valley, N. or Coniston, a sagegreen faintly-mottled felsitic rock occurs. It has a conchoidal fracture...

coals, or Pitch coals. These are black in colour, and usually possess a conchoidal coals fracture. Brown coals do not occur in Britain, but they are widely...

crystallized carbonate of lime, the general sometimes inclining to conchoidal is It is infusible alone before the blowpipe with efflorescence, to...

Neolithic conchoidal concave scraper (dorsal) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-04-02 21:26:36 Title Neolithic conchoidal concave...

Quartz one example, breaking, as it FIG. does, with a shell-like (conchoidal) fracture. In its purest form the mineral CRYSTAL OF QUARTZ. i. ...

indifferent, taking place in various ways promiscuously, with a form mostly conchoidal. Slight t races of irides¬ cence are occasionally seen, indicating the...

flint conchoidal flake (dorsal) Photographer Royal Institution of Cornwall, Anna Tyacke, 2005-12-31 18:45:03 Title Neolithic flint conchoidal flake (dorsal)...

distinctly seen on breaking tlie j)ieces ; these were brittle, and had a conchoidal fracture. The greatest hardness observed was about 7*5 ; the speciHc gravity...

flint conchoidal blade (drawing) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-02-26 15:45:49 Title Neolithic flint conchoidal blade (drawing)...

lustre, and perfect conchoidal frac¬ ture : from Diamond, by its crystallization, greater weight, inferior hardness, conchoidal fracture, and its grey...

fracture smooth, and even in the friable specL mem ;in the large perfectly conchoidal ; brittle srrd easily frangible, br& ing into splintery, rhomboidal, or...

fracture on the whole uneven, occasionally however, verging on the sub-conchoidal does not soil the fingers powder black, with a brownish tinge; it communicates...

granular, 3-636. It is amorphous, linely color waxy feeble, lustre fracture conchoidal with a cious, After intense igyellowish or green ish-white sub-translucent...

flint conchoidal blade (dorsal) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-03-26 22:37:55 Title Neolithic flint conchoidal blade (dorsal)...

by the indications which the works themselves present to the eye. The conchoidal fracture of silicious minerals in recognized forms, are sure indications...

Neolithic conchoidal flake (drawing) Photographer Finder, Anna Tyacke, 2006-01-08 23:35:08 Title Neolithic conchoidal flake (drawing) Description English:...

indications which the works themselves pre- sent to the eye. The conchoidal fracture of silicious minerals in recognized forms, are sure indications...

colors, but opaque; its conchoidal, much ; paler. is Quartz white same as the transparent and perfect conchoidal and sub- tough, brittle and...

flint conchoidal blade (dorsal) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-03-26 22:37:55 Title Neolithic flint conchoidal blade (dorsal)...

flint conchoidal blade (drawing) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-02-26 15:45:49 Title Neolithic flint conchoidal blade (drawing)...

"^ • Feet. -eratnuiW with f-™ tv.0 to t!,.ee one anthe; ^I'"^ « conchoidal feet, .UlZ"/ Tract, re ""^ ""'"'''' '" ^eds of 300 towards the """"''''^^...

marked conchoidal frac- opaque owing : Chert (including Hornstonc'] differs little from flint the fracture is splintery rather than conchoidal. Flint...

lustre with brown streak ; fracture inclined to slaty and conchoidal ; cross fracture conchoidal and of very uniform composition with deposits of calcium...

Page 2. Phosphorite. Common Apatite, 208 Common Phosphorite, 215 Conchoidal Apatite, 212 Earthy Phosphorite, 217 XXIII. Fluor Family. 1. Fluor...

flint conchoidal flake (ventral) Photographer Royal Institution of Cornwall, Anna Tyacke, 2005-12-31 18:45:03 Title Neolithic flint conchoidal flake (ventral)...

transparent. Somma, possession truncated with 186 larger figure) conchoidal. blende and By in hand are 3. Mount any is figure. very matrix...

flint conchoidal flake (dorsal inverted) Photographer Royal Institution of Cornwall, Anna Tyacke, 2005-12-31 18:45:03 Title Neolithic flint conchoidal flake...

flint conchoidal blade (ventral) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-03-26 22:37:55 Title Neolithic flint conchoidal blade (ventral)...

flint conchoidal blade (drawing) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-04-04 22:14:55 Title Neolithic flint conchoidal blade (drawing)...

black. ITa luire 2.3. greafy. ITS fracture perfehly Tranfparency o. conchoidal. ITS hardnefs from 7 to 8, very brittle. Specific gravity from 1,07 to...

) there can be no doubt; the pieces are co-adapted by similar smooth conchoidal surfaces, and their general appearance is the same. Two of the pieces...

chipped flake. Front, side and back views. — Bulb of percussion. — Conchoidal A. C. ripples. B. D. — Striking platform. — Flaking ridge. 20 flint...

Neolithic conchoidal concave scraper (ventral) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-04-02 21:26:36 Title Neolithic conchoidal concave...

showing the conchoidal fracture of flint. Title Diagram showing the conchoidal fracture of flint. Description Diagram showing the conchoidal fracture of...

Most of the heads of this class are slightly curved, pro? bably from the conchoidal fractureof the flint. One of them possesses a remarkable double twist...

of glance coal, bituminous anthracite, graphitic anthra- radiated and conchoidal anthracite, and cite, There varieties of iron ore. several are also...

FRANCES. I suppose if I could not take the specific gravity of it, the conchoidal fracture would distinguish it from sapphire, which always seems to break...

mathematical dis? cussion of certain geometrical and mechanical elements of a conchoidal surface. These are, the extent of the surface itself; the vo? lume contained...

streak of a reddish brown. Its specific Its fracture is in general small-conchoidal, but gravity is 2'62. with a tendency in some parts to a foliated fracture;...

difficult to explain ” (admirably shown by Dr. Tyson in his plate), to the conchoidal figure of the minute chipped-out cavities in plate-glass; which little...

flint conchoidal blade (ventral) Photographer Royal Institution of Cornwall, Anna Tyacke, 2006-03-26 22:37:55 Title Neolithic flint conchoidal blade (ventral)...

of various thicknesses, breaking trans- ; versely with an imperfect conchoidal fracture, with a shining resinous lustre, and sometimes yielding the...

rounded, with a few points and edges) and glass (which is jagged) leave conchoidal surfaces when but although they are servicetheir grains break able in...

there can be no doubt ; the pieces are co-adapted by similar smooth conchoidal surfaces, and then Two general appearance is same. the of the pieces...

minerals. It is found in masses, in veins, and in crystals. Its fracture is conchoidal, and it cleaves or separates into plates with great difficulty. Its most...

(calcilutite), very light buff-gray, with disseminated small crystals of calcite, conchoidal frac- 339 of 13. .'. 12. 11. ture, 10. 9. 8. 7. 6. 5. 4....

the limestone of this formation has a close texture, smooth surface and conchoidal fracture, approaching to lithographic limestones. The valley of the Mississippi...

crystallizing in a regular form. This form is a perfect cube; its fracture is conchoidal; its hardness is rather inferior to that of the slightly attractable oxide...

HARDNEss-Scratched -fametime. FR ACTURE Lateral fra?ure itnperfeUy conchoidal-Tranfverfe frathire flaty, palling into the coarfe-grainedearthy. GAVE...

coaL— Brownvi-black; fracture conchoidaL In nodii- Bitumen (solid specimens.) -Black, brown, green. U., fracture, conchoidal, vitreous iar and stolactitic...

considerable difficulty to perceive the faces of fracture, which are conchoidal. The physical quali ty of the surface of crystals is far more important...

descriptive purposes, fracture is divided into varieties, or kinds. 1. Conchoidal fracture. When it appears as though the face of the mineral was scooped...

Chalcedony b. d. c. f. Striped jasper Porcelainjasper Common jasper Conchoidal' Earthy Opal jasper' Agate jasper Common 64. Heliotrope Cornelian ...

the importation of argentiferous lead ore. Besides, the metal- liant conchoidal fracture, and has a general resemblance to jet or some of It is sectile...

co) inducing qp accompanying -K 2 sin 2 is co figure. It is conchoidal R is large the line appearance, and when approaches the position which...

lamination seen in the siliceous one, although both break with a similar conchoidal fracture. Perhaps the material, and not the organology, may account for...

which gives to the opal its precious character. Oracks or fractures of a conchoidal form are also present and also produce colour by reflected light but the...

small and angular an d by comparison those for SD-13 were large and conchoidal. .. _ _ _ _ / L _ Journal of R esearch of the Nat ional Bureau of Sta...

streak of a reddish brown. Its specific Its fracture is in general small-conchoidal, but gravity is 2'62. with a tendency in some parts to a foliated fracture;...

will then be seen to give fractures, developing a multitude of small conchoidal surfaces. This is by the miners termed bony coal; and that it well deserves...

are perfectlyflat. Major Owen said the fracture of flintwas no doubt conchoidal, but when broken in large pieces, the fracture appears flat, and in making...

brownish black or black in color, and often shows a brilliant luster, conchoidal and brown fracture, Where streak. from trunks or other large, woody...

lamination seen in the siliceous one, although both break with a similar conchoidal fracture. Perhaps the material, and not the organology, may account for...

lead-gray. Streak shining. Luster metallic. massive. Fracture small sub-conchoidal, uneven. Perfectly sectile, cutting like lead. H. 2-2*5. G. 7'196-7'365...

effect j'ellow — Cannel on the smoky coal, coals. flame. It shows conchoidal fracture. {After Campbell.) {After Ashley.) Bituminous coal burns readily...

more ease to the knife than amber; breaks easily, exhibiting a perfect conchoidal fracture; and some varieties seem to be of the same hardness with amber...

malachite likewisetraverseit in differentdirections. The fractureis small conchoidal,and in some partsof the mineralthere is a tendencyto a foliatedfracture...

gravity of 2.87 ; its fracture is uneven, and sometimes imperfectly P Y conchoidal. Its texture and colour are however extremely various, veins of several...

mineral when freshly fractured across the line of cleavage or lamination. Conchoidal fracture is when the surfaces are roughly curved into concave and convex...

the limestone of this formation has a close texture, smooth surface and conchoidal fracture, approaching to lithographic limestones. The valley of the Mississippi...

hard enough I. Jasper. to take a perfect polish. When the fracture is conchoidal the mineral The transitional states are confused is not jasper, but stained...

mathematical dis? cussion of certain geometrical and mechanical elements of a conchoidal surface. These are, the extent of the surface itself; the vo? lume contained...

abundallt. It was at first easily; and as fuel is all that is ignites conchoidal; now is slaty in fracture, but required. I consider it even better than...

but when broken It is much exhibits more frangi something of the conchoidal fracture. " The different properties just enumerated belong also to other...

brownish black or black in color, and often shows a brilliant luster, conchoidal and brown fracture, Where the lumps have formed large, woody masses...

calcareoargillaceous shales, at other times compact and Ineaking with a (See lists.) conchoidal fracture, holding abundance of fossils. Black and brittle impure (calcareo-argillaceous)...

white ; hard, portions light through nearly is Its fracture slightly conchoidal, fragments scratching gypsum. lustre more dull than that of ordinary wax...

considerable difficulty • to perceive the faces of fracture, which are conchoidal. The physical quality of the surface of cryitale.is far more important...

as follows. species NEW YOKK CLAYS OF Halloysite. A massive, conchoidal fracture. The hardness of 1-2. somewhat pearly to shows It no ...

colors, opaque but ; its conchoidal, much ; streak paler. is Quartz is white transparent and perfect conchoidal and sub- tough, brittle and...

brown, green, grey. massive. It feels greasy, is translucent, and has a conchoidal fracture. The finest specimens are brought from China. It does not contain...

plates of various thicknesses, breaking transversely with an imperfect conchoidal fracture, with a shining resinous lustre, and sometimes yielding the appearance...

the steel, and breaking It frequently contains grains of smoky with a conchoidal fracture. or limpid quartz, and sometimes very isolated minute crystals...

furnace. The material had a dull brassy color, metallic luster and a conchoidal fracture; but, as this portion breaks off in scales, it is difficult to...

black limestone in rather thin layers with shaly partings. Breaks with conchoidal fracture. Well shown dug by the Electric Power Co. Second zone of Plectambonites...

by Dana as follows. NEW YORK CLAYS OF Halloysite. A massive, conchoidal fracture. The hardness of 1-2. somewhat pearly or no- plasticity....

peculiar character, and is called VMteaU^e COal ky the English miners ; in conchoidal fracture, like 1 ^°t So ! as caPahle of receiving a good polish ; as dense...

shell-like fracture-surface which is called conchoidal, or if less distinct, small-conchoidal or sub-conchoidal. More commonly the fracture is simply said...

same bed presents brown coal that in different specimens is fibrous, conchoidal, trapezoidal, and earthy. Some of them have the appearance of compact...

shell-like fracture-surface which is called conchoidal, or if less distinct, small conchoidal or sub-conchoidal. More commonly the fracture is simply said...

Forces Active upon Liquid Surfaces which engender Waves, Protuberant ComConchoidal Forms. pressible Systems. Tangential Action. Motions of Rolling Contact...

comparaformation. tively brittle, and breaks with cubical or sometimes conchoidal fracture. On superficial inspection it shows imperfect traces of vegetable...

Coarse Crystalline, T.C. Tabular Crystalline, F.F'. Fine Fibrous, C. Conchoidal, V.C. Vitreo-ConehoidlV.-iros The maxima of. ductility, malleability,...

DescriptionConchoidally-fractured quartz 3.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite...

said to have the power of restoring its original color. It has a flat conchoidal fracture. 518 MINOE GEMS. Where Found, The Chrysoprase is found in...

Structure, imperfectly granular, and homogeneous fracture, imperfectly conchoidal imperfectly granular to lens Lustre magnesian, and appears a little speckled...

water trying to escape, and the two combine to give us a beautiful conchoidal swirl. In this case the particles seek the centre, but the same general...

liningjoints in the Calp limestone. Solid, opaque, resinous black lustre, conchoidal Iron Pyrites Asphaltum fracture. Loc. Castleknock. Loc. Castleknock...

present a friable chalky of the mineral, travertine colour :<?in flat conchoidal; to the feebly steel from varying : a the of a hard to buff:?fracture...

DescriptionConchoidally-fractured quartz 4.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite...

Curvegivenby theEquation sye-bs2 --x Ad) will (as theyfay)confi0of a conchoidalHyperbola anda Parabolas on thefameSidethe Afymptote or principal Ordinate...

sometimes iridescent, when it is known as "peacock coal." The fracture is conchoidal, lustre brilliant, and sub-metallic, or resinous to dull "Dry coals" are...

crystallizing in a regular form. This form is a perfect cube; its fracture is conchoidal; its hardness is rather inferior to that of the slightly attractable oxide...

the fracture, irrespective of structural joints and cleavage, It is is conchoidal, often flat and rectangular, and sometimes fibrous. distinctive of these...

DescriptionConchoidally-fractured quartz 1.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite...

appearance, and on the tops of some of these I have found deposits of conchoidal nodules of home stone, or rather opaque, gilicious stone, resembling flint...

DescriptionConchoidally-fractured quartz 2.jpg English: A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite...

and leek-green. It is massive. Fracture small, and "not very perfect conchoidal. " Internal lustre, resino-vitreous, and shining. It exhibits "lamellar...

it. In the solid state it is brilliant and shining and breaks with a conchoidal fracture and some external resemblance to obsidian. It has a pungent burning...

DescriptionTrego County Courthouse - color and conchoidal fracture suggestive of Neva Limestone from Manhattan 20171010 083317.jpg English: Trego County...

occupied by the siliceous substance called Tiornstone^ divided into the conchoidal and splintery varieties ; among the remarkable pseudomorphous Schneeberg...

(Petrosilex and compact felspar, Ha. \ Larnetherie* uncertain rock, conchoidal texture, petrosilex. Pttrosdex. A a compact among homogeneous,...

marks; colour, pure white, opaque; dull, earthy, but with a slightlv conchoidal fracture, and fissile along the planes of deposi tion; somewhat brittle...

occupied by the si¬ liceous substance called horn stone, divided into the conchoidal and splintery varieties; among these are the remarkable pseudomorphous...

colour from almost black to a pale green, compact, and breaking with a conchoidal fracture. It forms extremely sharpedged splinters, so keen that I have...

It is nitrogen in varying amounts up to 2*6 per cent. brittle, has a conchoidal or shell-like fracture, is of a sub- metallic to greasy, pitch-like...

break ; and when broken, they did not exhibit the lustre nor the conchoidal fracture of the simple bitumens. The remaining specimens also, although...

SALOON, liceous substance called hornstone^ divided into the -Nat^Hist. conchoidal and splintery varieties ; among these are the remarkable pseudomorphous...

base, Felstone. more or or apparently compact, with a crystalline, conchoidal, or fissile, texture ; smooth in colour yellow, grey, green, or...

isoccupiedby the siliceous substance called hornstone, divided into the conchoidal and splin- tery varieties ; among pseudoinorphous these are the remarkable...

contains It is nitrogen in varying amounts up to 2'6 per cent. or has a conchoidal shell-like is of a subbrittle, fracture, lead, usually of metallic to...

and electric is When till it ultimately becomes more bril- from conchoidal becomes more on the appearance of asphaltum so accurately that the eye...

(Stone, Kilkenny, or Crow-coal). does Black, with black streak ; fracture, conchoidal not soil the fingers; specific gravity, 1*3 to 1'75; less ; easily kindled...

crystal planes, the mineral fractures. The be even; uneven; rough; conchoidal = rounded, shell- may like; splintery; these terms referring to the...

occupied by the siliceous substance called hornstone, divided into the conchoidal and splintery varieties ; among these are the remarkable pseudomorphous...

octahedral faces. The cleavage is very on the cubical planes ; fracture conchoidal, opaque streak and colour, dead grey ; hardness, 2-5; spec, gravity, 7-5...

and is described as even, flat, bladed, hackly or irregular, splintery, conchoidal and subconchoidal, according to the appearance it presents. Roofing-slate...

similar in its general characters to ordinary glass, in that it presents a conchoidal fracture, is without crystalline form and cleavage, and if careis fully...

flake, no matter or outline, what its outer will present shape always the conchoidal fracture. The outside the usual rough cortical flakes, bearing 114 were...

a very dark oil-green colour, passing into raven black; the fracture conchoidal in all directions, with numerous dots of pearl-grey felspar. It lost by...

Smooth, glossy surfaces, as seen on breaking — — a piece of rosin. — Conchoidal. Usually smooth and shining like the resinous fracture, but the surfaces...

green these glass material; with glass, at the or edges. flat conchoidal pitchstono; Tho the rock is by natives in relievos. basso dull...

easily be distinguished from flint slate, by the latter having both a. conchoidal fracture, and the fractured sides being smooth. The grauwacke inclines...

readily THE POPULAR SCIENCE MONTHLY 24 flaked out with picks, in large conchoidal masses weighing from 50 to 75 pounds. It is honeycombed with gas cavities...

Brownian movement. the material shrank greatly, becoming a horny mass of conchoidal Williams fracture that would adhere strongly to the tongue. attributed...

color depends upon the depth of the bed of coal itself; it rarely has a conchoidal fracture well defined ; it is usually inferior as a fuel, containing...

masses —Yellowish-brown or dark brown opaque breaks with a dull conchoidal fracture ; ; bitter and a strong disagreeable odour dissolves almost...

Schmidt nice differentiations that Chellean retouches are coarse broad conchoidal leaving strongly marked concavities to well we know Syrian thus classified...

limestones, partly lithographic, with a fracturesmooth and dull, or very flat conchoidal. These are the limestones of the cavern of Caripe, (S. E. of Cumana,)...

occupied by the siliceous substance called hornstone, divided into the conchoidal and splintery varieties ; among these are the remarkable pseudomorphous...

meteorite was fifty-five pounds. It is ofa flattened shape, with numerous conchoidal indentations, and three annular openings passing through the thickness...

compact, -with ; very hard, striking fire abundantly with the with a conchoidal fracture. steel, and breaking frequently contains grains of It smoky...

hard and brittle, gives sparks with steal fracture of the crystallized conchoidal uncrystallized splintery lustre vitreous, resembling a piece of polished...

in compact masses with i. Specific cluding quartz and chalcedony. conchoidal fracture ; its microcrystalline structure is only SILICA 6 recognizable...

and is described as even, flat, bladed, hackly or irregular, splintery, conchoidal and subthe Giant's Roofconchoidal, according to the appearance it presents...

crystals, fusible and when in the name vitreous, of hyacinth of and conchoidal. Flint is has been called, but im- In one variety the quantity of...

color has a conchoidal fracture, it is is is flint. quartz occurs in white, tuberous masses, of a resinous lustre and conchoidal fracture, it...

form it. Gilsonite is a black solid of very brilliant luster and with a conchoidal fracture, and exceedingly brittle. When pulverized it forms a chocolate-brown...

scratched by the is no cleavage, but the mineral breaks with a is rounded conchoidal fracture is and The like glass. specific gravity Being both hard...

CG) G 3 a = 7 of a People’s 12, aN ; Culture.” WHOLE 1892. conchoidal and the mucilage is colorless| arms arranged within the vessel above the...

plane without elevations or excavations; 2d, An uneven; 3d, Conchoidal, exhibiting conchoidal excavations; 4th, Splintry, by showing small splintry parts...

breaking with a poor, loose sandstone fracture, or with a rich, fine, sharp, conchoidal, jaspery sui'face, showing the absence of the superiority of silex,...

breaking with a poor, loose sandstone fracture, or with a rich, fine, sharp, conchoidal, jaspery surface, showing the absence of the superiority of silex, ...

mass. and occasional tendency to assume a columnar structure. brilliant conchoidal Its The character and fracture configuration of its surface markings...

intercerebral ridge, There is to be is met with. near this space a conchoidal fracture, which Mr. Blake thinks might be the impression of the parietal...

to display ; them better. The main septo-maxillary {s.mx) is a conchoidal bone, equal in size to the broadest, inturned part of the maxillary just...

is what the German mineralogists would term muschligcr, that is of a conchoidal splintery fracture breaking like rosin. This is its true fracture but...

breaking with a poor, loose sandstone fracture, or with a rich, fine, sharp, conchoidal, jaspery surface, showing the absence of the superiority of silex, ...

presents brown coal that in different specimens is pieces. fibrous, conchoidal, and earthy. trapezoidal, Some of them have the appearance of compact...

conversant with the subject can for a moment doubt; the general form and conchoidal fracture leave no room for error; and the presence of bones of the extinct...

lines, thus they will, on becoming dull, break with the irregular to conchoidal fracture, which is As a matter corundum have comparatively the hardness...

the steel, and breaking It frequently contains grains of smoky with a conchoidal fracture. or limpid quartz, and sometimes very isolated minute crystals...

detached. At the lower end of the back -plate, (D), b b, is a delicate conchoidal surface of the rubber spring, tail, t, r, at its to of flattened...

excellent mill-stones. It is light brown color, its of a break conchoidal, has an earthy appearance, and rings like marble. Ponds and lime sinks...

White Arsenic. Prop. Shining white semi-vitreous lumps, breaking with a conchoidal fracture, and when pulverized, presenting the appearance of white sugar;...

limestones, breaking into conchoidal masses and destitute of fossils. in J Pi < Alternations of greenish-grey, Pi 28 cul>ical conchoidal marls, breaking...

is produced - in this maimer.' • ' Conchoidal.— The fracture of certain very brittle alloys is distinctly conchoidal and glassdike. An alloy consisting...

occupied by the siliceous substance called hornstone, divided into the conchoidal and splintery varieties; among these are the remarkable pseudomorphous...

amorphous masses, sometimes in rounded or angular pieces. Its fracture is conchoidal. Specific, gravity from 2.3 to 2.7. Its colours are various. When heated...

would in such incrusting masses. It is brittle and has a smooth sub-conchoidal fracture with a tendency to break into thin flakes(one isolated piece...

rocks may be, they have one feature in common, viz.. an exceedingly fine conchoidal fracture. But even the casual obsei-ver cannot fail to notice that the...

Of of Saxony, 266-268. the foliated augite of Carinthia, 269, 270. Of conchoidal apafrom Arendac, 265, 266. Of the columnar brown spar of Mexico, 272Of...

SALOON. Kat. Hist. liceous substance called hornstone^ divided into the conchoidal and splintery varieties; among these are the remarkable pseudomorphous...

is no ledge over which the material could have been carried. The sharp conchoidal fracture would not serve the purpose of such crystalline rocks as quartz...

angles of which are sometimes replacedby small planes. Its fractureis conchoidal: it has a smooth grain, with a small degree of lustre; and, although it...

a very important characteristic. it is Fracture FIG . Shell-like (conchoidal) fracture 3. of flint. of the same To the right, an arrow head ...

the inside of a shell Fig 3.— Shell-like (conchoidal) fracture To the right, an arrow head is termed conchoidal, Fig. 3. This of flint. fracture is beautifully...

the fracture depends upon the nature of the mineral. Thus quartz has a conchoidal fracture (resembling the curved surface of a bivalve shell) other minerals...

thickness, separated by thin shale partings. an earthy texture and a conchoidal fracture, and when freshly broken is black or dark-brown, but soon becomes...

fracture is and forming veins irregularly into little compact pieces conchoidal, by the sandy or 3* There are dispersed through the whole several...

Most of the heads of this class are slightly curved, pro? bably from the conchoidal fractureof the flint. One of them possesses a remarkable double twist...

in- made arrow- all sizes, seldom pointed, never barbed, having a conchoidal fracture on one side, and an angular one on the other and so deficient...

it is lost in the gravelly beach. It is broken in vertical shivers, or conchoidal plates, by a slight tap with the hammer formed of a very stubborn jade...

washing pre* paratory to reduction. Drusy, 54. Dull, 56. crystals, 42. Conchoidal, 65. Coralloidal. to coral. Having a resemblance Cretaceous. chalk...

bedded and chertlike in character, often translucent in thin edges, with a conchoidal to subconchoidal fracture. The waterworn volcanics comprise volcanic...

occupied by the siliceous substance called hornstone, divided into the conchoidal and splintery varieties ; among these are the remarkable pseudomorphous...

This is of great value in the cutting of the diamond. The fracture is conchoidal and the hardness the greatest of any known mineral being rated as 10 in...

from flint and certain other sub¬ stances, by taking advantage of the conchoidal or shell-shaped fracture of the material; by this method, combined with...

from a light gray the break The Ponds and sink holes and has an earthy conchoidal, appearance. 488 Florida. are numerous and this between the Chactawhatchee...

different kinds of fracture . METALS. 15 these are severally termed conchoidal hackly even , and uneven , When , and concave a substance breaks with...

in succession are of an ash-grey colour, are compact in texture, and conchoidal in fracture sells for nearly the : these afford a buff coloured lime...

which, like off The pinnules were and divided into three or four conchoidal, rounded, slightly lobed segments. sending and appear in the pinnule...

glassy lustre, is no cleavage, but the mineral breaks with a is rounded conchoidal fracture is and and remains long a very durable mineral, do not attack...

amorphous masses, sometimes in round or angular pieces its fracture is conchoidal specific gravity from 2 to 2-7. Its colours are various when heated it...

structure of the wood, to the hard, black, shiny anthracites, which show conchoidal fracture, and display but little evidence tions, lignites, of their...

a dark bluish-grey colour with vitreous lustre, and irregular to sub-conchoidal fracture. In those places, however, where the deposit has been subject...

whiter blue. a more or less conchoidal or glassy fracture, when broken ; some of the bluer strata are exceeding conchoidal in their fracture, and have...

24 THE POPULAR SCIENCE MONTHLY flaked out with picks, in large conchoidal masses weighing from 50 to 75 pounds. It is honeycombed with gas cavities...

determined by the texture of the rock : in common flint, and in glass, the conchoidal form of the fracture is easily seen to respect the point of impulse. It...

bituminous lignite or pitch coal (' peckkohle,' glanzkohle '), having a conchoidal fracture, pitch-black in colour and frequently resembling coal, and sometimes...

by the clay that now forms the shale roof and floor of the mine. The conchoidal fracture of the Albert coal, which is often referred to to prove it is...

four feet ; it is a hard close-grained argillaceous limestone with a conchoidal fracture, and contains a few fossils, which, however, usually break transversely^...

deep black, comparatively brittle, and breaks with cubical or sometimes conchoidal fracture. On superficial inspection it shows imperfect traces of vegetable...

the coal. river at the junction of The same bed fibrous, presents conchoidal, brown coal trapezoidal, that in specimens different and earthy...

occupied by the siliceous substance called hornstone, divided into the conchoidal and splin¬ tery varieties ; among these are the remarkable pseudomorphous...

containing, clay. compact igneous rock, which breaks with a splintery or conchoidal fracture. Batrachia. The group of animals and Newts belong. Belemnites...

transmitted light are of a pale brown or chestnut-brown color. The fracture is conchoidal and glassy. It emits a somewhat peculiar nauseous odor by breathing on...

characteristic and is commonly desig- nated by the following terms: Conchoidal, when the surface presents a somewhat shelly appearance; fibrous or splintery...

removed by boiling caused in linseed The fracture of amber, which is conchoidal (shell-like) more or less shining and vitreous. Its consistency is oil...

ordinary temperature; may be powdered, but soon cakes; fracture shiny and conchoidal, softens at 100° C; burns with a dense smoke; heavier than water; faint...

of Lyell, are of all sizes, seldom pointed, never barbed, having a conchoidal fracture on one side, and an angular one on the other ; and they...

Crystalline or amorphous. 3. Cleavage (number of planes). 4. Fracture (conchoidal or irregular). 5. Colors. 6. Luster. 7. Hardness. 8. Effect of...

laminated structure of wood. Its The plate J re­ transverse fracture is conchoidal and glossy, volves idly until the key hole is covered or for about a...

pieces like roll sulphur when held in the hand. Its fracture is smooth and conchoidal, it does not adhere to. the B 2 : 4 CLAY LANDS AND LOAMY SOILS. tongue...

These are known respectively as fibrous, In colour they vary earthy, conchoidal, and bituminous. from brown to brownish-black but the streak that is,...

much paler. Quartz is transparent and opaque its fracture is perfect conchoidal and subchonchoidal, is tough, brittle and friable. The polarization of...

neighbourhood. The miiurul is dull black externally ; it breaks with a conchoidal fracture, giving a very brilliant jet-black surface. It is scattered in...

crumbled into little pieces by the nail. The fracture is irregularly conchoidal, sandy or ' • earthy. There arc dispersed through the whole sgeral spherules...

isolated Quartz crystallized, ochrous with filled kankar of a conchoidal and fracture, having the hammer. when struck by in Chota mountain there...

NOMENCLATURE Geologically, flint is a hard rock of dense structure, showing conchoidal fracture and no apparent cleavage, and composed chiefly According to of...

division has a more or less conchoidal or glassy fi-acture, when broken some of the bluer strata are exceeding conchoidal in their fracture, and have...

exceedingly compact, breaking much along weathered joints, or with a conchoidal fracture ; the colour is bluish-green, with many soft black spots, for...

color depends upon the depth of the bed of coal itself; it rarely has a conchoidal fracture well defined ; it is usually inferior as a fuel, containing...

layers are very bright and compact, and have a resinous lustre and highly conchoidal fracture, while ; others are An more dull analysis of the lowing...

also carrying much mica; it is 8 to 8*4 hi hardness, is opaque, fracture conchoidal, homogeneous and tough. Corundum, the abrasive metal so called, is an...

character reminding one of gneiss. They are most frequently crumpled and conchoidal both in small and in large bed planes. Explorers. —Hayden reported...

and there clear, arid li.is a. An inferior kind, called Whde Pitch, i» conchoidal, gla-ssy frarture. obtained from the resin that is first produced in the...

from ceramic materials the same as a body. Ceramic Dictionary 24 CONCHOIDAL—Having a shell like nature or fracture. CONTINUOUS KILN—Compartment or...

alkali metals, and aluminum. Thorite is a brittle mineral, having a conchoidal fracture, a hardness of 4.5-5, and 2 specific gravity of 5.19-5.40. The...

OTHER FORMS OF luster is vitreous, . sometimes greasy, Quartz has a conchoidal fracture commonly brilliant to nearly dull. like glass. or white,...

planes very obliquely inclined to Fractures of the coal presented a conchoidal and The deposition planes showed a good deal The coal is laminated with...

massive, = = = m in embedded grains. Cleavage none. Fracture conchoidal to unG. =371-3-76. Luster resH. =5. even. Color gray, yellowish gray....

dense, compact, and close-grained varieties, which usually give ; a conchoidal fracture, afford, likewise, little microIn the scopical evidence of a...

produced pieces. in this manner. Conchoidal. The fracture of certain very brittle alloys is distinctly conchoidal and glass-like. An alloy consisting...

henceforth collectively refer to them as cracks. Conchoidal fractures in quartz were not common. Some conchoidal fractures did, however, occur when quartz...

fracture resembles that of impure cannel. In others it is dis tinctly conchoidal and of the color of lignite; while again it resembles the Grahamite of...

Black crystal Tabular, Spinel (optics) to irregular, shiny, partly conchoidal, brown up to 0.5 coating, Sporadic mm (XRD) up to Rutile 0.5...

af'{a]. (*) Quand la directrice amb est rectilignc, la surface, conchoïdal, est fort intéressante. Le modèle en a nommée hyperbolotde été construit...

tin, it is easily fusih'e has a fine compact grain and a vitreous conchoidal and yellowishAccording to Klapred fracture. roth, the finest-toned Indian...

brownish black or black in color, and often shows a brilliant luster, conchoidal and brown fracture, streak. from trunks or other structure is flame...

(b). Evidence tllat these cracks exLend down into the target plate in a conchoidal type of fract ure is presen ted below. Sapphire has been broken out oj...

cubic ft. of gas. Entirely compact without grain, with silky lustre and conchoidal fracture. Communicated by J. Mackenzie, 1873. 72. Petroleum oil cannel...

retouched. A good number of flakes with two opposed impact points and non-conchoidal fracture display use of the common bipolar on anvil technique, not the...

which show no evidence of micaceous structure and possess excellent conchoidal fracture. The lilac and lavender lepidolite is highest in lithia content...

made is a peculiar kind of bluish, gray or brownish flint, of slightly conchoidal fracture, and capable of splitting into large flat fragments. I never...

vegetable extract of a brownish black color. The fracture is somewhat conchoidal, but some of the fragments in our possession have a surface such as would...

centre to of reticulated, a round the are seen the circum on conchoidal Each of form, nearly resembling the shell of the genus nautilus. these...

but when broken It is much exhibits more frangi something of the conchoidal fracture. " The different properties just enumerated belong also to other...

savages as a tractable stone, It chipping. shaped by readily breaks with a conchoidal fracture, blow that is, when struck a sharp with another hard stone,...

a texture somewhat like very closely grained wood, and breaks with a conchoidal fracture, but the seams do not appear to be of equal richness throughout...

sandy grain, disposed to slaty structure, passing into a compact, smooth, conchoidal, quasicannel, but never, so far as I have seen, a true cannel coal. In...

of iron as the colouring oxide This glaze presented originally in its conchoidal is still exhibited This vitreous opaque. aspect, though The a with to...

in selection, aud preparation^ for use. The best stone breaks with a conchoidal fracture ; on breathing on it, a clayey smell is perceived j colour light...

concretionary, and probably is a hardened precipitate. The fracture is conchoidal, having the appearance and color of unglazed porcelain. Amorphous magnesite...

crystalline pyroxene rock, dark chocolatecoloured silicious argillite with conchoidal fracture, calcspar veinstones, semi-ti-anslucent white quartz, red aplite...

aediuni-grained, and appeared ie be well beaded. The fracture was rough-to conchoidal, but the particles were about equidimensional. The porosity appeared...

occurs as a massive, fine-grained, pinkishwhite rock breaking with a conchoidal fracture. Some of the coarser varieties are distinctly crystalline in...

examined were cleavage pieces broken from luster. The fracture being conchoidal, the surfaces these large crystals. were curved and indented unless cut...

English author name string: Óðinn Wikimedia username: Óðinn object of statement has role: photographer URL: https://commons.wikimedia.org/wiki/user:%C3%93%C3%B0inn...

and has yet to be removed. Massive, vitreous. Brittle. specimens sub-conchoidal. translucent. Cohmr pale Fi-acture uneven, angular; Lustre sub-viti-eous...

two are and pyroschists. schists asphaltum, asphaltic a with brilliant conchoidal, sometimes pure bitumens, amorphous, is soluble in fracture. Asphaltum...

trilobites and brachi- red shale, and a fine- grained limestone with conchoidal fracture that weathers orange- These beds are followed by yellow. shales...

compact,and, whenbroken,the fracture appearssmooth, sometimesa little conchoidal; its surface, how-, ever, has a very fine grain, which, when viewed with...

of Turkey gum, less brittle and pulverizable, and breaking with a more conchoidal fracture. The French give the name of Gum Galam ( Gamine de Galam ) to...

substance appears much like basalt in tex- ture, but its fracture is less conchoidal; it de- composes into an imperfect species of wacke, and ultimately...

about is the exactly of size a sometimes, however, the with conchoidal Fracture tarnish. The powder metallic lustre. is few a Colour pure...

hard as to be fragile throughout, and presents angular fragments with a conchoidal fracture. Mr. GORDON adds, that the resistance of the pitch to its own...

caracterizado h La cara inferior es lisa, ligeramente cóncava debido á la rotura conchoidal de la piedra; la superior presenta una arista longitudinal próxima á uno...

pyroschists. The first two are pure bitumens, amorphous, with a brilliant conchoidal, sometimes angular, fracture. Asphaltum is soluble in bi-sulphide of...

chiefly quartz sand, sub-angular. There are also a few showing sharp conchoidal (luart/,, of preparations five Several fracture. quartz grains...

wholly foseilized, of a dark dining brown colour, ponderous, brittle, of a conchoidal fracture, and nt.ining little even of the bone-earth itself in their composition...

for 1868, Trans, 77 ; Geol. and Nat. Hist. Eepertory, vol. The Conchoidal Fracture of Buildings (Bep. Brit. Assoc. for 1868 Aug. 22 23. [see...

the original was composed of silex or of any other material that had a conchoidal fracture. If the Xanthidia were originally sihceous, there is no reason...

metal exhibit this phenomenon. 18. The fracture of amorphous antimony is conchoidal, smooth, and wavy; that of the grey variety is crystalline, radiating...

which on exposure shivers without becoming plastick; and coal, both the conchoidal and tle brittle rhomboidal burning with flame. The argillaceous sandstone...

Pliicker and a few new terms in Chapter IX, suggested in the conoid; The conchoidal hyperboloid of Catalan is probably treated in English for the first time...

woody structure 62 6 32 6 27 65 Earthy Brown Coal Brown Coal proper (conchoidal) 25 70 5 combined with as be The being regarded oxygen may (N.B. - 3...

substance appears much like basalt in tex- but its fracture is less conchoidal it decomposes into an imperfect species of wacke, and ture, ; ferruginous...

English Cannel coal, and is susceptible of a high polish. Its fracture is conchoidal; it is free from impurities, and never slacks or crumbles when handled...

Physically the coal is sometimes shaly but usually compact and breaks In with conchoidal fracture; its hardness is 2.5; its specific gravity 1.4. color it is black...

by which it is traversed, which cause it to assume cuboidal instead of conchoidal forms on fracture. A preliminary examination of an outcrop specimen from...

rounded ledges and grades which lies to the south of it. and breaks with a conchoidal fracvery ture. It is red in color, containing in about equal numbers many...

coalisfreecarbon, unworkable. orrendered exhausted homogeneous, andwith conchoidal andrich.Mostofthecoalsare fracture. Some arebothnumerous varieties fields...

assume a fan-shape. After which the fan-shape has a tendency to assume a conchoidal form (like that of a clam-shell) and finally, becominginto a tree-like...

blue-black, very dense, exceedIt ingly fine-grained, and has a hackly to conchoidal fracture. shows on certain surfaces a very fine banding which is distinctly...

generally divided into thin beds that are whitish, with a fracture dull, conchoidal; but, in mountains of transition limestone, there exist insulated masses...

of Turkey gum, less brittle and pulverizable, and breaking with a more conchoidal fracture. The French give the name of Gum Galam (Gomme de Galani) to a...

darker of fracture The blow-pipe. on tho largo scale, is flat conchoidal; It bears in different hardness of degrees the to the to the (dose...

—In yellowish-brown or dark-brown opaque masses breaks witli a dull conchoidal fracture and a strong disagreeable odour spirit, ; ; has a bitter...

noticeable to the common observer. They are massive, hard, dense, amorphous or conchoidal in fracture, w4th fine, sharp edges when broken, and a rich satin or an...

brittle fubftance, of abrownifh black, or blackWhen broken, it fhews a conchoidal fracture with a gladly luftre. It has little of the bituminous odour,...

is which is in is On if dilute found than exists it slightly conchoidal. it and compact fracture of this application of heat, in cartilage...

were found. A He composed of this rock.* Worthen almost to massive conchoidal fracture and white dove-color of the stone indi- solidity, cate is...

substance, ; True Burgundy Pilch.— Color, dull yellowbrown fracture shining, conchoidal, translucent some samples contain much water, and are opaque, and of a...

sometimes, but less frequently, dark and homogeneous, breaking with a conchoidal fracture, to soft, coarse and open. Ordinarily, the nummulitic limestoue...

very complete individuals from this rock, and from its peculiar serui conchoidal fracture it is not easy to obtain sections along any given well-defined...

removals either occur along naturally acute angles, resulting in small conchoidal removals, or are detached from natural oblique intersections and can be...

basalt, occurs of the hills in largo cubic masses. It is its perfect conchoidal on the highest summits dark in the interior, contain- ing small cavities...

form. mine, the vein-stuff The mineral quite compact, breaking with a conchoidal fracture, perfectly white, opaque, and resembling in its physical character...

breaking with a in gum is chiefly centred. in the interior. ; more conchoidal fracture.* * An interesting account is given by M. J. Leon Soubeiran...

if we are dealing with fairly large fragments amorphous bodies show a conchoidal fracture and their surfaces- are uneven, while those which are crystalline...

Liliaceae. Charact. In dark-brown opaque masses, breaking with a ; — dull conchoidal fracture ; has a nauseous bitter taste, and a disagreeable odour, usually...

to the nail, but occasionally hard enough to scratch Brittle. Fracture conchoidal. Transglass. Constituents: silica lucent or transparent. 41.4; lime 48...

por- Cleavage and even faces, and faint indications paFracture small conchoidal. tions of very bright P. rallel to M Surface, very smooth, and delicately...

of which the woody 87 visible Cannel or Parrot Coals, in or less conchoidal, all of which the fracture and the peculiar is tissue characteristic...

columnar. Fractured, not cleaved, surfaces are less instructive they may be conchoidal, uneven, splintery, or hackly. Transparency. For want of a more comprehensive...

name state; but its fracture much is less like basalt in tex- conchoidal; it de- composes into an imperfect species of wacke, and ferruginous...

diameter it is compact, of a dark brown color, and breaks with a smooth conchoidal fracture. The position and peculiarities of this ore indicate that it...

the opaque varieties, is dulL It breaks easily, exhibiting a perfectly conchoidal fracture, and is of the same hardness with the amber of the Baltic. This...

certain was the same as that described on j). 103 as " black, with conchoidal fracture and white streak," and was found afterwards to be carbonaceous...

the most characteristic. is drab color, very fine .c^rained with a conchoidal fracture, which makes for lithoi^raphic stone. shows appearance The...

steel-grey colour, with metallic lustre, opaque, brittle ; the fracture is conchoidal; the streak-powder dark-grey, or black; hardness 2*5 3; spec. grav. (...

Fracture referring to any surface except that of a cleavage may be uneven, conchoidal (shell-like, hackly, rough, etc.). THE MINER’S GUIDE 20 Tenacity refers...

been made from argillite, The greatly indurated, and breaking with a conchoidal fracture. specimens were weathered to a greater or less extent and showed...

oidal, some oolitic, and some argillaceous. The latter breaks with a conchoidal fracture, is very fine grained, and has been used for lithographic purposes...

and and compact as it exists fracture of this bone On slightly conchoidal. examination, and particularly application of heat, it is which cartilage...

the Turkey gum, less brittle and pulverizable, and breaking with a more conchoidal fracture. The French give the name of Gum Galarn (Go)nme de Galam) to...

optical qualities of precious stones ished are various. that In some conchoidal. Among them when a ray of is the when cut and pol- power of reflection;...

having shell-like appearSome of the more important ances, it is called conchoidal. common and 1. aggregates are : Composed of small crystals arranged...

consist typically of blue shales or mudstones having a characteristic conchoidal fracture and weathering into lens-shaped fragments. * G-eogr. "An With...

Form of Carbon. 8 [July, scratch of a knife, and broke with a smooth conchoidal fracture, the lustre of which resembled in quality that of the finest...

The coal is very hard, pure and black, other passage. with a beautiful conchoidal fracture, and perfectly clean The middle, an area 50 yards across, has...

of vitreous felspar. PITCHSTONE. A homogeneous vitreous mass, with conchoidal fracture, translucent at the edges, of various colours, of red, yellow...

breaking is called fracture; the broken surfaces are usually irregular or conchoidal (i. e., PREPARATORY INSTRUCTION. 3 with concave or convex outlines...

black colour, quite hard, of uniform texture and breaking with a broad conchoidal Fresh surfaces glisten somewhat from the presence fracture. of minute...

Company, of the same colour as on the Quincy is grained, and in places a conchoidal fracture The amygdules even observable. are smaller, and the metallic...

resin finds some use in rubber mixings; it is hard, brittle resin, with a conchoidal fracture, very much resembling our ordinary rosin. It is soluble in...

is situat- New York : road, precious ser- The varieties. has a conchoidal fracture,' and presents various first shades of green and yellow, and...

would not break or crumble. The flint always broke under a blow with a conchoidal fracture, and this may be frequently seen. These implements differ somewhat...

gray, or of a dark grayish blue have a compact texture fracture even or conchoidal with a clayey or earthy smell and taste. Although the hydraulic lime-stones...

in copper. Metals which possess it are strong, tough, and malleable. Conchoidal, This appearance is presented by the harder varieties of The metal breaks...

we have here gotten below the walrus area and the region of stone with conchoidal fracture. If is also evident that we are away from the lines of Aboriginal...

—In yellowish-brown or dark-brown opaque masses breaks with a dull conchoidal fracture and a strong disagreeable odour ; ; has a, bitter nauseous...

• (O.) n. In close proximity are found fibrous brown Earth coal. Conchoidal brown coal. t. Trapezoidal brown coal, f. 1^. coal. characters of...

25, lines 8, 15, and 23, for Gamnal read Gammal. „ 31, line 12, for conchoidal read conoidal. „ 38, line 10 from bottom, for Fall read Bath. „ 41,...

coarse white fragments, fracture lustre, dull ; ; flat, even conchoidal, colour, bluish-gray streak, ; subtranslucent in ; very thin pieces...

and lized which is a hard mineral, sometimes crystalat others or conchoidal, found generally in thin seams in crystalline or colour from The ...

chalcedony. composed of case examined were the flint and having the same conchoidal fracture, occur frequently, and often project from the surface where it...

to massive beds. In most has weathered into flattened fragments of conchoidal fracture. Because of this form it is moved with difficulty by the...

granulated, zinc, intensity in prism generally and the Vitreo-Conchoidal, was 7th C. note eability, .. V.C of termined termined ach s...

—Yellowish-brown or dark brown opaque masses; breaks with a dull conchoidal fracture; bitter nauseous tase, and a strong disagreeable odour dissolves...

the individual grains. Quartz is hard without cleavage, breaks with a conchoidal fracture and does not easily comminute under wear. 6. Friction sands which...

porcelain saccharoidal or granular and ; offer a stout resistance is conchoidal like that of the true porcelain to a file, body while the flint,...

the Turkey gum, less brittle and pulverizable, and breaking with a more conchoidal fracture. gum are imported into this country from Ainslie states that...

variety of bitumen Hlbertite, How, 1860. with a brilliant lustre and conchoidal fracture. : : H = i 2 S.G. about i.i. It differs from manjak and uintaite...

opake and hard, barley-sugar loses transparency, its fracture, which was conchoidal, appears then its even, and shows internally crystallized forms. prove...

fracture is unequal, and commonly coarse-grained,but sometimes imperfectly conchoidal. The fragments are amorphous. The trace is yellowish-gray, with some metallic...

The plagioclase has no pronounced cleavage and breaks with more or less conchoidal fracture. It is opaque and has a vitreous luster. It contains from 0.50...

Drusy, 54. Dull, 56. Coke, 90. Columnar, 52. Compound crystals, 42. Conchoidal, 65. Coralloidal. Having a resemblance Earthy. Soft like earth, and...

Carboniferous age. It is a fine-grained, dense, vitreous quartzite with a conchoidal to uneven fracture. There is a very little of the fine-grained siliceous...

and they usually contain few or no pebbles. appear to be more or what conchoidal less fissured, fracture. Exposed and break with an irregular and someto...

to 1-8. powder either black or brown. sub-metallic, and its fracture conchoidal or hardness varies from Its colour was formed It usully presents a...

within the ovary in the class Mammalia, 316. Colours of mixed plates, 73. Conchoidal surface, determination of the area of, 362; determination of the centre...

rhomboid, many modifications and varieties. On being broken has shows a conchoidal fracture, seldom a lamellar appearance. best sapphires were formerly found...

Chester County, Pa. 1 a rock of an homogeneous appearance, fracture conchoidal, splintery on the edges, color dark grey, passing to black, decomposes...

Fracture Black Odor Asphaltic 232 F. Softens . Dull Homogeneous Semi-conchoidal Street Pavement 21 241 Flows Penetration at 77 F substance, loss...

of steatite is is it may be confounded simple forms, splintery or conchoidal. with greenstone. Containing crystals of glassy 2. of felspar, or...

uniform character. It is very dense and hard and easily very breaks with a conchoidal fracture. The hard and brittle character of the rock is a quality of important...

body and about 1,000° for the glaze. The fracture of true porcelain is conchoidal like that of flint, that of artificial porcelain requires a temperature...

is It is made it and the most compact, and breaks with a clean conchoidal fracture, prefer in cubical masses, is esteemed the to all other whites;...

a fire, and a The figure to the piece of glue with its characteristic conchoidal fracture. The lower cut shows a plank of rare wood right is applying glue...

species are These are strikingly evident. that they sometimes with conchoidal so cemented together, form a hard compact limestone, fracture and...

witli a — ^In dtill yellowisli-brown or dark-brown opaque masses conchoidal fracture and a strong disagreeable odour spirit, ; ; has a bitter...

r ello wish-brown dark brown opaque or masses; breaks with a dull conchoidal fracture; bitter nauseous taste, and a strong disagreeable odour dissolves...

the 1824.] Rocks of Mount Sorrel, S)C 9 hard to admit of a flat conchoidal though not without considerable owing to the thorough intermixpressure...

the original level surface of the water db c ,for an asymptote. This- conchoidal elevation, produced in the first moment, being just ecemat in bulk to...

abundant, and while made possessing of the nearest the necessary conchoidal fracture, in some cases they are of material brought from a long Specimens...

Orange county, easily obtained; in others, entirely obliterated by the conchoidal or uneven fracture. Lustre metallic, but sometimes imperfect; opaque,...

from marl, more or less indurated, to a hard com¬ pact limestone, with conchoidal fracture, and translucency on the edges. In some places the organic remains...

bluish-grey colour this has a resinous lustre, and possesses a distinct conchoidal fracture, but exhibits well-defined lines showing layers of deposition...

substance ap- pears much like basalt in texture, but its fracture is less conchoidal; it decomposes into an imperfect species of wakke, and ultimately into...

easily cut with a knife or scratched with the nail, and breaks up in conchoidal fragments when freshly exposed. It is cream-colored to white when dry...

structure, with the exception of 2 Fe 0 + 3 Si 02, the fracture of which is conchoidal (Berthier). The dark colour of common bottle-glass is chiefly owing to...

throughout the samples. The grains were angular to rounded with semi-conchoidal fracture surfaces. . The grains were principally colorless or salmon...

figure moves along a while a line of the figure, 1', containing the Conchoidal Motion 29. [29. : A always passes through a fixed point B point...

; internal lustre between 3 and 4 vitreous fracture small, imperfect, conchoidal, with a concealed foliated fracture, and fourfold ; ; ; ; cleavage;...

argillaceous of this rock hydrated silica has been deposited this cement conchoidal be atti-ibuted fracture. finer-grained way tion in a to is its...

in its general characters : to ordinary glass, in that it presents a conchoidal fracture, is without crystalline form and cleavage, and if carefully...

gives a dark green bead with borax, and presents a fracture more or less conchoidal. · Passing to the east-south-east of the Coley hill dyke in the line <noinclude>...

be more or less fissnred, and break with an irregular and some- what conchoidal frosts, fracture. Exposed to atmospheric agencies, moisture, and ...

into consideration. The external characteristic of the mineral Gels conchoidal lost be expected, of their formation as disintegration products if...

of a compact structure (ex. obsidian) generally show, when broken, a conchoidal fracture, or a series of circular markings resembling the obsidian, lines...

with a fetid smell, but with little smoke or flame. Some and others are conchoidal likecannel varieties resemble charcoal, coal. Amber is also noticed...

if we are dealing with fairly large fragments amorphous bodies show a conchoidal fracture and their surfaces are uneven, while those which are crystalline...

dealing with fairly large fragments ; amorphous bodies show a conchoidal fracture and their surfaces are uneven, while those which are crystalline...

these are usually made of the nearest local rock possessing the necessary conchoidal fracture, in some cases they are of material brought from a long distance...

not they are variable ; Different Kinds. 1 7 in hardness, even, conchoidal, or uneven, in fracture, frequently breaking into pieces more or less...

and if by chance it becomes chipped or shattered it exhibits a distinct conchoidal fracture, resembling that of a flint pebble. INTRODUCTORY. The members...

contain. They do not soil the fingers, are very hard, and break with a conchoidal fracture. The formation of anthracite has probably been effected by the...

difficulties. is of the But the : ; GEOMETRY OF MOTION. i6 29. Conchoidal Motion fixed straight line 1, A : point [29. A of the figure moves...

Columnar ; as in a piece of tough copper. fracture; commerce. (6.) Conchoidal fracture alloys such as that ; as observed in the grain tin of noticed...

smartly tapped, emitting a bell-like ring, has a fine, close grain, a conchoidal tolerates The glaze full of (i.e., flint-like) fracture, and the...

form prismatic arrangements. In this state the fracture exhibits minute conchoidal appearances, which display the form of each globule. A more slow degree...

other passage. The coal is very hard, pure and black, with a beautiful conchoidal fracture, and perfectly clean The middle, an area 50 yards across, has...

calcareous beds, like the lithographic limestones, splitting with a flat conchoidal fracture. In it I did not observe any fossils but I had not many opportunities...

have failed to produce the desired result; the seat of the flake is more conchoidal, shorter and deeper depressed, whereas the direct percussive pressure...

motherof-pearl opal. (See Mineralogy, Vol. XVI, p. 390.) has a flat, conchoidal fracture, and it is found united with common chalcedony. CACIQUE OR CAZIOUE...

of small splinters. t is fused with difficulty, and has a vitreous and conchoidal fracture. The mineral shows no signs of cleavage planes or crystalline...

dark bottle-green colour; the fine powder is greenish grey; fraCture conchoidal to splintery. Specific gravity 4-201—4-254.”! Most of the gadolinite is...

than coal, whilst at others they are black and shining, and with a conchoidal fracture these variations in appearance being due to the conditions ;...

(according to Moh's scale). Both are colorless to white, brittle, and have a conchoidal fracture. In specific gravity, however, there is a marked difference ;...

others non-crystalline; some are easy to work while others break with a conchoidal fracture; some have a light gray color, others a buff, and others...

siliceous it consists of almost pure silica with a splintery or From the conchoidal fracture and homy or resinous lustre. abundance of spicules and skeletons...

felspar and quai-tz; the fracture is Some parts of the rock exhibit sub-conchoidal, lustre vitreous. numerous parallel stripes of a lighter colour, which...

employed in medi- administered internally in catarrhs, some- it is ; conchoidal, and the completely dissolved by the It is successive action of ether...

flinty or silicious rock, with a perfectly smooth compact texture, a conchoidal or shell"a like fracture, without anything we could call grain."* * A...

rise to curved surfaces, having shell-like appearances, it is called conchoidal. Some of the more important and common aggregates are : of small crystals...

nail, but occasionally hard enough to scratch glass. Brittle. Fracture conchoidal. Translucent or transparent. Constituents : silica 41.4; lime 48.0; alumina...

6 is a well-formed implement of The upper surface exhibits usual conchoidal flint, virtually three surfaces, fractures. The under common of...

fossiliferous, occasionally somewhat earthy in appearance, and shows conchoidal fracture. The cavernous nature of this region is due wholly to the charac-...

from the lofty crag meets the green sparkle of the sea. till it The conchoidal rip- plings of this sand cataract, with the varied features of the cliff...

fragments of which this deposit is formed are sharply angular and generally conchoidal. The shoots of these stones are well known locally by the name of " glitters...

pressure and movement one Hint upon another, resulting in chips with conchoidal fractures, "bulbs of Prestwich, Quart. Journ. Oeol. Soc., \\i, p, 21...

pofition, has a great degree general fradture is of indu- roughly conchoidal. Soil. Aggregate Blue Clay flate. rock. The Upon pafllng this ...

dating back to about 1400. The faces of the flints often exhibit tiny conchoidal fractures, which were no doubt produced when the blocks of flint were...

rendering it porphyric. It is ex- ceedingly brittle with a tendency to conchoidal fracture. Under the microscope it is seen to consist of brown glass in...

retain water, browner or bluer, digs hard, falls in large lumps of a conchoidal fiacture. Stratum, indurated micaceous yellowish clay, brown to...

generally found either is in white, opaque, porcelain-looking masses with a conchoidal fracture, or as a white powder. perfectly inodorous. It is It is volatilised...

lamination and are uneven for other directions of The allel division. The conchoidal fracture presents smooth concave and convex and is characteristic of a...

and subsequently impregnated with " In that was hence originated the conchoidal fracture and peculiar resinous lustre ; which these specimens The ...

outcrop on the north the shales north of Mayaguez. most having the conchoidal cherts. nicols, it appears as a fine aggregate of In thin section,...

texture varies from hard, close^ and homogeneous, breaking is with a conchoidal fracture, to soft, coarse and open. Ordinarily, the nummulitic limestone...

the geometrical outlines. fracture is small, rather irre- gularly conchoidal, and has a glassy appearance. stone more or is may brittle, be scratched...

Druggist of Australasia, published " 64,464. Al Brand," on figure of conchoidal crystal for perfumery. By A. W. Shirley, 30 Paternoster Square, E C. 64...

breadth, tapering at opposite end, nearly side, : flat showing waves of conchoidal fracture throughout its on one entire length, on the other, showing...

excepting the tricalcium silicate and plaster, did not break with the conchoidal smooth surface of the former, but either with a rough surface as when...

fractures, developing a multiThis is by the miners termed tude of small conchoidal surfaces, sition. It will bony coal its ; and that it well deserves...

Earth's huge skull on my shoulders. Observe how the occiput is braced By a conchoidal-cissoid curving under The great trapezium which crushes up The polar axis...

coals extracted a. , , 1 . • ' . . , y. — 6. «. Earth coal. Conchoidal brown <;. , (G.) ., . /9. :.j : Ligneous. ,1 .; Coniferous. ....

a heavy white powder, or in opaque or semitransparent lumps, having a conchoidal fracture. It is entirely volatilized by heat, is without odor, has little...

a heavy white powder, or in opaque or semitransparent lumps, having a conchoidal fracture. It is entirely volatilized by heat, is without odor, has...

rather a longitudinal segment of an ellipse ; ?5 both are of a conchoidal shape, having ellipse; concave surfaces closely applied their The...

the cleavage directions. The most important kinds of fracture are: the conchoidal, the mineral ; 8 breaking with curving concavities and convexities resembling...

or copper, they duce the desired result the seat of the flake is more conchoidal, and deeper depressed, whereas the direct percussive pressure throws off...

iron-grey usual weathering processes, the rock of compact aspect and sub-conchoidal fracture, with scattered crystals of glassy felspar shewing, in the freshest...

inland, is this leaping, heaving plain, reminding one, by its innumerable conchoidal curves, not of water, not even of ice, but rather of obsidian. After all...

to the pound. CANNEL COAL. A compact description of coal, with a conchoidal fracture it burns with a bright flame, like a Its composition is as candle...

milk white, with j purpose in relieving tbe weight that, in an open fur¬ conchoidal fracture and strong vitreous lustre. The nace, is imposed upon the materials...

cent sodium, which in its free state Halite is rather brittle and has a conchoidal fracture. is a metal. Its hardness is 2.5; its specific gravity ranges...

while thus the time exceedingly hard, and if broken will snap with a conchoidal fracture, which of hard and close substances. teristic is generally...