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Strand Length: 35 cm / 13
originating from the nearby Rubielos de la Cerida impact structure
These qualities
Size: Ring Size 7
3ct | 38
Biotite Mica Book | Black Crystal | 71 Grams | Ontario, Canada | SO24 Fluellite Strand Length: 35 cm /This 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.
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