Turquoise
Turquoise is a gemstone with the chemical formula CuAl6(PO4)4(OH)8·4H2O. It has a Mohs hardness of 5 to 6 and waxy to vitreous luster.
Turquoise properties
| Type | Gemstone |
|---|---|
| Chemical formula | CuAl6(PO4)4(OH)8·4H2O |
| Mohs hardness | 5 to 6 |
| Luster | Waxy to vitreous |
| Typical colors | Sky blue to green, often with a mottled appearance |
| Formation | Formed from the weathering of copper deposits and as a secondary mineral in igneous conditions |
| Rarity | 6 / 10 |
Mohs hardness 5–6 — fairly hard
1 · Talc5 · Apatite10 · Diamond
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