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It frequently occurs in distinctive pyramid-like structures
as lightning strikes are associated with sudden inspiration or illumination
" Ametrine is relatively rare compared to other gemstones and is mainly found in Bolivia
This beautiful crystal has excellent clarity
4x1 Inches
Biotite Mica Book | Black Crystal | 48.8 Grams | Ontario, Canada | SO24 Apatite It frequently occurs in distinctiveThis is a 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. Single
