Biotite Mineral Specimen (Si Chuan, China) Dodecahedron Bracelet for Protection from Electro

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Biotite Mineral Specimen (Si Chuan, China) Dodecahedron Bracelet for Protection from ElectroBiotite Mineral Specimen These mineral specimens are from Si Chuan, China. These are iron rich variety of biotite, formed in "sheets, also called Annite. The colouration is black, with dark green overtones. These small and powerful specimens come in a box but can be easily removed to work with. We have sourced these pieces from the Tucson Gem and Mineral show 2024. Biotite, also called black mica, typically forms in scales or layers, resembling books