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