mineral

Chrysocolla on Matrix

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

Hardness: 2.5-3.5 on Mohs scale; Color: Cyan (blue-green) to green; Luster: Vitreous to dull; Crystal Structure: Monoclinic; Cleavage: None; Specific Gravity: 2.0-2.4

Hardness: 2
Color: Cyan (blue-green) to green
Luster: Vitreous to dull

Identified May 2, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 on Mohs scale; Color: Cyan (blue-green) to green; Luster: Vitreous to dull; Crystal Structure: Monoclinic; Cleavage: None; Specific Gravity: 2.0-2.4

Formation & geological history

Formed as a secondary mineral in the oxidation zones of copper ore bodies where copper-bearing solutions react with silica-rich groundwater.

Uses & applications

Primarily used as an ore of copper and as a semi-precious gemstone for jewelry, cabochons, and ornamental carvings.

Geological facts

Chrysocolla is often confused with turquoise but can be distinguished by its lower hardness and higher copper content. It is sometimes found as a 'psuedomorph' replacing other minerals like malachite or azurite.

Field identification & locations

Identify in the field by its distinct vivid blue-green color associated with other copper minerals like malachite or azurite. It often feels slightly sticky to the tongue due to its porous nature. Found in major copper mining regions like Arizona, Chile, and the DRC.

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mineral