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It features orangey feldspar and greenish beryl on this interesting and showy combination of material
The specimen is made up of two joined complete mica crystals with all crystal faces and terminations
other deposits are found in countries such as Russia
60 g was found by Pete Meyers on May 18
Biotite Mica Book | Black Crystal | 55.6 Grams | Ontario, Canada | SO24 Amphibole It features orangey feldspar andThis is a sharp, beautiful, black Biotite crystal book from the Calcite Vein Dikes of the Grenville Geological Province Ontario, Canada. This specimen is a great example of both the classic crystal shape and attractive dark coloration. 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
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