mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Mohs hardness of 2.5 to 3.5, color ranges from cyan, blue, and green to dark brown, vitreous to earthy luster, cryptocrystalline structure, conchoidal fracture with no distinct cleavage, specific gravity of 2.0 to 2.2
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Physical properties
Mohs hardness of 2.5 to 3.5, color ranges from cyan, blue, and green to dark brown, vitreous to earthy luster, cryptocrystalline structure, conchoidal fracture with no distinct cleavage, specific gravity of 2.0 to 2.2
Formation & geological history
Formed in the oxidation zones of copper ore bodies, typically as a secondary mineral resulting from the alteration of primary copper minerals in arid environments.
Uses & applications
Primarily used as a gemstone, for decorative carvings, and in ornamental jewelry, frequently cut into cabochons.
Geological facts
Chrysocolla gets its vivid blue-green color from the presence of copper. The name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referencing its historical use in soldering gold.
Field identification & locations
Identified by its distinctive bright blue-green coloration combined with dark matrix patches and a relatively soft feel. Found worldwide, with significant deposits in the USA, Russia, Chile, and Zaire.
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