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Biotite Mica Book | Black Crystal | 71 Grams | Ontario, Canada | SO24

Name: Biotite Mica  
Specimen Size:  Large Cabinet-Sized  
Dimensions:  144x72x3 mm / 4.7x2.8x0.1 inches  
Weight:  71 Grams / 2.5 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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