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This piece has not been dyed or altered in any way
Specimen # BOL711B129
or rare inclusion gems
which is not common for the species
Specimen # BROOK31920
Cassiterite bi-color This piece has not beenCassiterite is rarely seen in faceted stones as the material if often not transparent enough to cut fine stones, plus it requires a skilled cutter to properly handle the brittle material. Bolivia has probably produced more Cassiterite ore than any country in the world. The large majority of the Cassiterite from Viloco is completely opaque and black. Rarely, gem quality crystals are found and those that escape the crusher are prized for their clarity.
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