mineral
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
AI-generated identification · may be incorrectHardness: 2.5-3.5 (Mohs scale), Color: Cyan-blue to green, Luster: Vitreous to earthy, Crystal Structure: Orthorhombic (usually cryptocrystalline/amorphous), Cleavage: None, Specific Gravity: 2.0-2.4
- Hardness
- 2
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Physical properties
Hardness: 2.5-3.5 (Mohs scale), Color: Cyan-blue to green, Luster: Vitreous to earthy, Crystal Structure: Orthorhombic (usually cryptocrystalline/amorphous), Cleavage: None, Specific Gravity: 2.0-2.4
Formation & geological history
Formed as a secondary mineral in the oxidation zones of copper ore bodies. It occurs as botryoidal crusts or vein fillings, often associated with malachite, azurite, and quartz.
Uses & applications
Used primarily as a minor ore of copper, as a gemstone for jewelry (cabochons and beads), and as a popular specimen for mineral collectors.
Geological facts
The name comes from the Greek 'chrysos' (gold) and 'kolla' (glue), referring to its ancient use as a flux for soldering gold. It is often confused with turquoise but is much softer and lighter.
Field identification & locations
Identify by its vivid blue-green color and tendency to stick to the tongue due to its porous nature. Commonly found in arid regions like Arizona (USA), Chile, and the DRC.
