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It contains inclusions of tan and crimson
it is a gray or brown mineral with a pearly luster
which is itself a form of Muscovite
Biotite was named in honor of the French physicist Jean-Baptiste Biot
Golden Obsidian 10x14mm Barrel - Large Hole Beads HPS04212022 It contains inclusions of tanGolden Obsidian is a naturally occurring volcanic glass, shiny black with a golden sheen. Obsidian is produced when lava erupts from a volcano and cools rapidly with minimal crystal growth. It is sometimes used for scalpel blades in cardiac surgery, as Obsidian can be formed into a blade many times sharper than steel surgical blades.
US$ 31.84
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