Name COLEMANITE
Variety COLEMANITE
Origin K├╝tahya (Turkey)
Hardness 4,5
Composition Ca2B6O11,5H2O
Crystaline sys. MONOCLINIC
Size   10,5x7x7 cm
Weight 470 gr




Description:
It derives its name from the owner (W.T. Coleman) of the mine in Death Valley (California, USA), where it was first found. It is used to extract boron, and its beautiful crystals, very rich in facets, are cut as gems for collections, as its modest hardness (4 to 4.5) don't make it suitable for jewellery.


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COLEMANITE



VARIETY COLEMANITE