mineral

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 (often mixed with quartz reaching 7); Color: Cyan, blue-green, or turquoise; Luster: Vitreous to earthy; Crystal Structure: Orthorhombic (usually massive); SG: 2.0-2.4

Hardness: 2
Color: Cyan, blue-green, or turquoise
Luster: Vitreous to earthy

Identified July 7, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 (often mixed with quartz reaching 7); Color: Cyan, blue-green, or turquoise; Luster: Vitreous to earthy; Crystal Structure: Orthorhombic (usually massive); SG: 2.0-2.4

Formation & geological history

Secondary mineral formed in the oxidation zones of copper ore bodies, often occurring as crusts, vein fillings, or botryoidal masses in arid environments.

Uses & applications

Used as a minor ore of copper, as a gemstone for jewelry, and as a popular collector specimen.

Geological facts

Often confused with turquoise due to its color, but chrysocolla is softer and often has a more vivid green-leaning hue. It frequently forms as a mixture with other minerals like malachite, azurite, and quartz.

Field identification & locations

Identified by its distinctive blue-green color and its tendency to stick to the tongue due to its porous nature. Commonly found in copper mining districts of Arizona, Chile, and the DRC.