Biotite Mica Book | Black Crystal | 126 Grams | Córdoba, Spain Scolecite Name: Volcanic Bomb

Name: Volcanic Bomb

Dimensions:   111x85x57 mm / 4

The stone was dug out of the ground on Monday morning and brought to town

This full slice measures 55x32x3 mm

Weight:  10

Biotite Mica Book | Black Crystal | 126 Grams | Córdoba, Spain Scolecite Name: Volcanic BombThis is a beautiful, black Biotite crystal book from Crdoba. Spain. This biotite has a 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 "books" of biotite can grow to considerable size and can make impressive mineral specimens.