mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Hardness: 2.5 to 3.5 on the Mohs scale, Color: Cyan, blue-green, or green, Luster: Vitreous to earthy, Crystal structure: Orthorhombic (often cryptocrystalline or amorphous), Cleavage: None, Specific gravity: 2.0 to 2.4
- Hardness
- 2
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Physical properties
Hardness: 2.5 to 3.5 on the Mohs scale, Color: Cyan, blue-green, or green, Luster: Vitreous to earthy, Crystal structure: Orthorhombic (often cryptocrystalline or amorphous), Cleavage: None, Specific gravity: 2.0 to 2.4
Formation & geological history
Forms in the oxidation zones of copper ore bodies, typically as secondary mineral deposits in arid environments.
Uses & applications
Used mainly as an ornamental stone, in lapidary arts, for gemstone carvings, and in jewelry.
Geological facts
Its name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referencing its historical use in soldering gold.
Field identification & locations
Easily identified by its vibrant blue-green color and association with copper deposits. Found worldwide, notably in the USA, Russia, and Chile.
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