bn:03262540n
Noun Concept
Categories: Building stone, Vitreous rocks, Soil improvers, Felsic rocks, Articles with short description
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perlite  E599  Perlight  Perlitic Structure
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Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. Wikipedia
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Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. Wikipedia
An amorphous volcanic glass formed by the hydration of obsidian. Wiktionary
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