Okenite is a silicate mineral that is usually associated with zeolites

Approx Weight (per piece): 137

and North America

5 gram Impact Vesicular Breccia also referred to as Suevite coming from the famous Rochechouart impact structure in South Western France

This specimen is in excellent condition

Biotite Mica Book | Black Crystal | 50 Grams | Ontario, Canada | SO24 Dhofar 019 Okenite is a silicate mineralThis 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