mineral
Chrysocolla
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
AI-generated identification · may be incorrectHardness: 2.5 to 3.5 on Mohs scale; Color: Cyan, blue, greenish-blue, or green; Luster: Vitreous to dull, earthy; Crystal System: Orthorhombic/Amorphous; Specific Gravity: 2.0 - 2.4
- Hardness
- 2
- Color
- Cyan, blue, greenish-blue, or green
- Luster
- Vitreous to dull, earthy
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Physical properties
Hardness: 2.5 to 3.5 on Mohs scale; Color: Cyan, blue, greenish-blue, or green; Luster: Vitreous to dull, earthy; Crystal System: Orthorhombic/Amorphous; Specific Gravity: 2.0 - 2.4
Formation & geological history
Secondary mineral formed in the oxidation zones of copper ore bodies, often intergrown with quartz, malachite, or azurite in arid to semi-arid regions.
Uses & applications
Minor ore of copper, popular as an ornamental gemstone, cabochons, and gemstone carvings for lapidary collectors.
Geological facts
Chrysocolla was first described in 315 BC by Theophrastus. Its name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referencing its historic use as a solder component for gold alloys.
Field identification & locations
Identified by its distinctive vibrant blue-green color, low hardness, and association with copper mineral deposits. Frequently found in Arizona (USA), Chile, Peru, and the Democratic Republic of the Congo.
