Africa contains several outstanding Malachite deposits

Prehnite can form prismatic

This is a strand of Smoky Quartz beads with an overall length of 39 cm (15

Approx Weight (per piece): 103

Biotite Mica Book | Black Crystal | 68 Grams | Ontario, Canada | SO24 Albite Africa contains several outstanding MalachiteThis 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.