16.69: Turquoise
- Page ID
- 6499
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Turquoise | |
---|---|
Chemical composition | CuAl6(PO4)4(OH)8.5H2O |
Crystal system | Triclinic |
Habit | Botryoidal, massive, microcrystalline to granular |
Fracture | Conchoidal |
Hardness | 5.0 - 6.0 |
Refractive index | 1.610-1.650 |
Specific gravity | 2.30-2.90 |
Lustre | Waxy |
Figure \(\PageIndex{1}\): Persian turquoise