Chrysocolla | |
Chemical Formula |
(Cu,Al)2H2Si2O5(OH)4·nH2O |
Species |
Silicates |
Crystal System |
Orthorhombic |
Mohs Scale |
2-3 |
Specific Gravity |
1.9-2.4 |
Color |
Blue, blue-green, green |
Streak |
white to a blue-green color |
Luster |
Vitreous, Waxy, Earthy |
Refractive Index |
n = 1.575 - 1.585 n = 1.597 n = 1.598 - 1.635 |
Diaphaneity |
Translucent, Opaque |
Cleavage |
None ObservedNone |
Fracture |
Irregular/Uneven, Sub-Conchoidal |
Crystal Habit:Massive, nodular, botryoidal | |
Geological Setting:Found in the oxidation zone of copper deposits, often encrusting or replacing earler secondary minerals. |