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Soil Mid‑importance Perlite is within the scope of WikiProject Soil, which collaborates on Soil and related articles on Wikipedia. If you would like to participate, you can choose to edit this article, or visit the project page for more information.SoilWikipedia:WikiProject SoilTemplate:WikiProject SoilSoil Mid This article has been rated as Mid-importance on the project's importance scale. Rocks and minerals Mid‑importance Perlite is part of WikiProject Rocks and minerals, an attempt at creating a standardized, informative, comprehensive and easy-to-use rocks and minerals resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.Rocks and mineralsWikipedia:WikiProject Rocks and mineralsTemplate:WikiProject Rocks and mineralsRocks and minerals Mid This article has been rated as Mid-importance on the project's importance scale. Geology Mid‑importance This article is within the scope of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.GeologyWikipedia:WikiProject GeologyTemplate:WikiProject GeologyGeology Mid This article has been rated as Mid-importance on the project's importance scale. Volcanoes Mid‑importance This article is within the scope of WikiProject Volcanoes, a collaborative effort to improve the coverage of volcanoes, volcanology, igneous petrology, and related subjects on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.VolcanoesWikipedia:WikiProject VolcanoesTemplate:WikiProject VolcanoesWikiProject Volcanoes Mid This article has been rated as Mid-importance on the project's importance scale.

It is requested that an image or photograph of unexpanded or "raw" vermiculite, as it occurs naturally before processing be included in this article to improve its quality. Please replace this template with a more specific media request template where possible. The Free Image Search Tool or Openverse Creative Commons Search may be able to locate suitable images on Flickr and other websites.

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Where is an explaination for perlite as a pattern of steel? --217.235.9.187 20:56, 21 Mar 2005 (UTC)

You want Pearlite, not Perlite. -- 143.252.80.124 18:10, 20 July 2005

Is it necessary? There are multiple photos in the article. I'd remove the reqphoto tag, but I want more input first.

AngryZinogre (talk) 05:01, 1 October 2017 (UTC)[reply]

Vermiculite was tagged here as only used in horticulture, which is not accurate. Perlite and Vermiculite are "cousins", with many exfoliators making products using both lightweight aggregates.--Achim 23:34, 27 August 2006 (UTC)[reply]

The reason was that horticulture is the main application in which vermiculite competes with perlite.

Similarly, diatomite, is not only used for filter-aids, but it is the main application in which diatomite competes with perlite.--FocalPoint 15:32, 28 August 2006 (UTC)[reply]

An element box is needed for this article.Anwar 16:05, 31 May 2007 (UTC)[reply]

Someone might consider consolidating refs (currently #s 2+5) to "http://minerals.usgs.gov/minerals/pubs/commodity/perlite/mcs-2008-perli.pdf" (I don't remember how to do it; somehow involves assigning an ID to the first ref, then referencing that ID at subsequent citations).

philiptdotcom (talk) 13:39, 14 August 2009 (UTC)[reply]

 Done —EncMstr (talk) 15:45, 14 August 2009 (UTC)[reply]

Perlite is a rock name or perhaps primarily a rock name. What is the mineral composition of this rock? Is it perhaps microcrystalline vermiculite that gives the expansion?150.227.15.253 (talk) 09:43, 11 January 2018 (UTC)[reply]

Being an amorphous glass it has no mineral crystals, but the article includes a typical chemical composition. Vermiculite is a clay mineral, so the two are entirely unrelated. The expansion in perlite is also due to the evaporation of trapped water, but there the similarity ends. Mikenorton (talk) 10:12, 11 January 2018 (UTC)[reply]

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The source that is given as proof of the density of perlite does not give any information on density. where does this information come from?  77.87.228.70 (talk) 11:41, 11 December 2024 (UTC)[reply]

Considering the statement that Perlite is "a non-renewable resource" and the great usefulness of Perlite, particularly in expanded form, plus dependence on the NATURALLY hydrated source rock, Obsidian, I would like to know more about the possibilities of ARTIFICIAL hydration of source rock for making Perlite. From the related article on Obsidian, it seems likely that the hydration can be greatly accelerated by shattering Obsidian into dust. Is that not logical? Surely the non-hydrated source rock is not in short supply. Or is it? Also, are there other source rocks that might be used in place of Obsidian? As that Obsidian article states, "Obsidian is formed from quickly cooled lava. Extrusive formation of obsidian may occur when felsic lava cools rapidly at the edges of a felsic lava flow or volcanic dome, or when lava cools during sudden contact with water or air."

Please clarify and expand, if possible.

Thank you. YodaWhat (talk) 21:04, 12 October 2025 (UTC)[reply]