Biotite Mica Book | Black Crystal | 50 Grams | Ontario, Canada | SO24 NWA 2965 89 million years ago when

89 million years ago when a meteorite crashed into the earth making a round crater which is now a lake about 11 miles wide

particularly sphalerite crystals often associated dolomite

8 Gr total)

Name: Apophyllite

Biotite Mica Book | Black Crystal | 50 Grams | Ontario, Canada | SO24 NWA 2965 89 million years ago whenThis 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