mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
AI-generated identification · may be incorrectHardness is 2 to 4 on the Mohs scale. Colors range from bright cyan, turquoise blue, to green with a vitreous to earthy luster. It has an amorphous or cryptocrystalline crystal structure and uneven fracture.
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Physical properties
Hardness is 2 to 4 on the Mohs scale. Colors range from bright cyan, turquoise blue, to green with a vitreous to earthy luster. It has an amorphous or cryptocrystalline crystal structure and uneven fracture.
Formation & geological history
Forms as a secondary mineral in the oxidized zones of copper ore bodies. It precipitates from silica-rich copper-bearing solutions in arid environments.
Uses & applications
Primarily used as a gemstone and for ornamental carvings, often cut into cabochons for jewelry. It is also a minor ore of copper.
Geological facts
Chrysocolla is often found intimately mixed with quartz, malachite, and azurite, enhancing its hardness and visual appeal. The name comes from the Greek words chrysos (gold) and kolla (glue), referring to its historical use in soldering gold.
Field identification & locations
Easily identified in the field by its distinct vibrant robin's-egg blue to greenish-blue color and association with copper deposits. Major localities include the southwestern United States, Chile, Peru, and the Democratic Republic of the Congo.
