mineral

Chrysocolla in Matrix

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

Hardness: 2.5-7.0 (varies based on silica content); Color: Cyan, blue, and green; Luster: Vitreous to dull/earthy; Crystal Structure: Amorphous/Monoclinic (rare); Specific Gravity: 2.0-2.4

Hardness: 2
Color: Cyan, blue, and green
Luster: Vitreous to dull/earthy

Identified April 3, 2026More mineral →

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Physical properties

Hardness: 2.5-7.0 (varies based on silica content); Color: Cyan, blue, and green; Luster: Vitreous to dull/earthy; Crystal Structure: Amorphous/Monoclinic (rare); Specific Gravity: 2.0-2.4

Formation & geological history

Formed in the oxidation zones of copper ore bodies. It occurs as a secondary mineral through the weathering and leaching of copper-bearing rock, often associated with azurite, malachite, and cuprite.

Uses & applications

Primarily used as a minor ore of copper, as a semi-precious gemstone for jewelry, and as a decorative stone for mineral collectors.

Geological facts

Chrysocolla is often confused with turquoise but can be distinguished by its lower hardness and its tendency to stick to the tongue if licked due to its high silica/water absorption.

Field identification & locations

Identify in the field by its distinct bright blue-green color inside a dark brown or reddish iron-oxide matrix (gossan). Commonly found in dry, arid regions like Arizona (USA), Chile, and the DRC.

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