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Biotite Mica Book | Black Crystal | 275.6 Grams | Ontario, Canada | SO24

Name: Biotite Mica
Specimen Size:  Large Cabinet-Sized
Dimensions:  108x77x20 mm / 4.5x3.0x0.8
Weight:  275.6 Grams / 9.7 Ounces
Origin:  Ontario, Canada

 

This is a sharp, beautiful, black Biotite crystal book from the Calcite Vein-Dikes of the Grenville Geological Province Ontario, Canada. This biotite has classic crystal shape and attractive dark black coloration. This specimen is a great example of both,

Biotite is rarely considered a valuable mineral specimen, but it can accompany other minerals and compliment them. In Bancroft, Ontario Biotite forms large crystals with green apatite and hornblende. Single large plates or "books" of biotite can grow to considerable size and can make impressive mineral specimens.

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