Biotite Mica Book | Black Crystals | 68.5 Grams | Ontario, Canada | SO24 Mangano Calcite 03-00027-H - 35x30 mm /

03-00027-H - 35x30 mm / 14 Grams

What sets them apart is their striking surface texture—often finer

Strand Length 38 cm /15 inches

NOTE: Treatment by Lead Glass Filling

Biotite Mica Book | Black Crystals | 68.5 Grams | Ontario, Canada | SO24 Mangano Calcite 03-00027-H - 35x30 mm /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.