Biotite Mica Book | Black Crystal | 275.6 Grams | Ontario, Canada | SO24 Dolomite which is a type of

which is a type of microcrystalline quartz

This is a large piece of Augite and Scapolite crystal from Ontario

Most of the fluor-richterite crystals are not complete

This deformed rock fragments and partly molten are imbedded in a melt matrix showing typical flow structures from former melt

would make a beautiful addition to any collection or start one today

Biotite Mica Book | Black Crystal | 275.6 Grams | Ontario, Canada | SO24 Dolomite which is a type ofThis 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.