mineral
Chrysocolla
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Hydrated Copper Phyllosilicate)
AI-generated identification · may be incorrectHardness: 2.5-3.5 (Mohs scale), Color: Cyan-green, deep blue, or brownish-black when mixed with other minerals, Luster: Vitreous to dull, Crystal Structure: Orthorhombic (rarely crystalline), Specific Gravity: 2.0-2.4
- Hardness
- 2
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Physical properties
Hardness: 2.5-3.5 (Mohs scale), Color: Cyan-green, deep blue, or brownish-black when mixed with other minerals, Luster: Vitreous to dull, Crystal Structure: Orthorhombic (rarely crystalline), Specific Gravity: 2.0-2.4
Formation & geological history
Formed in the oxidation zones of copper ore bodies. It occurs as a secondary mineral resulting from the leaching of copper by silica-rich waters.
Uses & applications
Primarily used as a minor ore of copper, a gemstone for jewelry (often stableized), and as a mineral specimen for collectors.
Geological facts
Chrysocolla is often confused with turquoise but is generally softer. Its name is derived from the Greek words 'chrysos' (gold) and 'kolla' (glue), referring to its use as a flux for soldering gold in ancient times.
Field identification & locations
Look for its characteristic cyan or blue-green color near copper mine tailings or outcrops. It is commonly found in Arizona (USA), Chile, Congo, and Israel.
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