The matrix is massive augite and scapolite

Its dimensions are 33x26x4mm

some have been tied to certain strewn fields

care should be taken to avoid rough handling and exposure to extreme conditions

Each Amethyst root is beautiful and unique

Biotite Mica Book | Black Crystal | 45 Grams | Ontario, Canada | SO24 L5-6 The matrix is massive augiteThis 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