Black gemstones

September 16, 2009

By precious stones

Black gemstones

Hardness. Specific Gravity.

Diamond 10 3.502-3.564
Garnet 6-1/2-7-1/2 3.400-4.500
Jet 3-1/2 1.348
Onyx (a variety
of Chalcedony) 6-1/2 2.598-2.610
Quartz 7 2.670
Tourmaline (not unlike
Black Resin in appearance) 7-1/4 3.024-3.300

Tags: Black gemstones, Black Resin, Chalcedony, diamond, garnet, Jet, Onyx, quartz, tourmaline

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