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Biotite Crystals on Matrix Biotite aslo known as Black Mica, is a common phyllosilicate mineral within the mica group. Biotite is form in sheets of iron, magnesium, aluminum, silicon, oxygen, and hydrogen weakly bond together by potassium ions. The chemical formula is K(Mg,Fe)3AlSi3O10(F,OH)2. Biotite can be found in many igneous and metamorphic rocks; it can be found in New Englad, Virginia and North Carolina, USA, and in Bancroft and Sudbury, Ontario. But the single largest Biotite crystal was found in Iveland, Norway, measuring 7 m2. Approximate Size: (2 ½” by 2 ½“)

Biotite Crystals on Matrix

SKU: RSMABIO

Regular price $6.00 USD /


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Stone: Biotite

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Biotite Crystals on Matrix Biotite aslo known as Black Mica, is a common phyllosilicate mineral within the mica group. Biotite is form in sheets of iron, magnesium, aluminum, silicon, oxygen, and hydrogen weakly bond together by potassium ions. The chemical formula is K(Mg,Fe)3AlSi3O10(F,OH)2. Biotite can be found in many igneous and metamorphic rocks; it can be found in New Englad, Virginia and North Carolina, USA, and in Bancroft and Sudbury, Ontario. But the single largest Biotite crystal was found in Iveland, Norway, measuring 7 m2. Approximate Size: (2 ½” by 2 ½“)

"New website features more sorting options that are a huge help in simplifying my ordering process. The images are accurate reps of quality and look and size is often given with a comparison item (coin). I very much appreciate the write-ups for traditional and modern benefits and properties of each stone including the very lovely stone meaning cards (really appreciate the new cards use of colour, graphics, and write-ups" - Christine F.

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