and is still important in modern industries

Approx Weight (per Strand): 154ct

Weight:  10

Dimensions: 54x27x19 mm / 2

Biotite Mica Book | Black Crystal | 39 Grams | Ontario, Canada | SO24 Pistacite and is still important inThis is a 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 plates or