Violet gemstones

September 16, 2009

By precious stones

Violet gemstones

Hardness. Specific Gravity.

Amethyst 7 2.661
Diamond 10 3.502-3.564
Quartz (Amethyst) 7 2.670
Sapphire 9 4.049-4.060
Spinel 8 3.614-3.654
Tourmaline 7-1/4 3.160

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