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 Amethyst |
| Crystal structure : Rhombohedral |
Composition : Silicon dioxide |
| Specific gravity : 2.65 |
Hardness : 7 |
| Refractive index : 1.544-1.553 |
Birefringence : 0.009 |
| Variety : Quartz |
Pleochroïsm : variable (purple, purple-gray) |
Cut :      |
| Amethyst takes from Greek “amathustein” meaning “not to be drunk” because we attributed to this stone supernatural capacities like the chance, the force, protection against the spells and drunkenness ! |
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| Deposits : |
| The countries having deposits are : |
Country |
Quantity |
Quality |
Comment |
| Brazil |
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| United states |
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| Madagascar |
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| Russia |
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