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This is a beautiful cluster of intergrown pyrite and tetrahedrite
Its dimensions are 63x51x36mm
This excellent specimen weighs 46
03-00026-C - 34x26 mm / 96
Origin: Peru
Biotite Mica Book | Black Crystals | 127.4 Grams | Ontario, Canada | SO24 Calcite This is a beautiful clusterName: Biotite Mica Specimen Size: Cabinet Sized Dimensions: 101x78x10 mm 4. 0x3. 1x0. 4 inches Weight: 127. 4 Grams 4. 5 Ounces Origin: Ontario, Canada 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
