Panaeolus cyanescens, Mycology Wiki
File:Vermiculite-21362.jpg - Wikimedia Commons
Basics of Clay Minerals and Their Characteristic Properties
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Serpentine subgroup - Wikipedia
Vermiculite
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File:Golden-Expanded-Vermiculite-2.webp - Wikimedia Commons
Vermiculite: Mineral information, data and localities.
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Phlogopite: Mineral information, data and localities.