It is polished on both sides with raw edges

color bands

Clarity:  VSI (Very Slightly Included)

named Campo del Cielo (Heaven’s Field in Spanish) that was found in 1576 by Spanish explorers

Biotite Mica Book | Black Crystals | 68.5 Grams | Ontario, Canada | SO24 SaU 001 It is polished on bothThis 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.