Biotite Mica Book | Black Crystal | 45 Grams | Ontario, Canada | SO24 L4 This is a natural raw

This is a natural raw bi-color tourmaline crystal

As the marcasite breaks down

This is a superb looking slice of a Dhofar 224 classified meteorite weighing 23

Origin: Durango

Biotite Mica Book | Black Crystal | 45 Grams | Ontario, Canada | SO24 L4 This is a natural rawThis 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