mineral

Chrysocolla in Matrix

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Hardness 2.5-3.5 (often harder if mixed with quartz); Color: bright cyan-blue to green; Luster: vitreous to earthy; Crystal System: Monoclinic; Cleavage: none.

Color: bright cyan-blue to green
Luster: vitreous to earthy

Identified May 10, 2026More mineral →

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Physical properties

Hardness 2.5-3.5 (often harder if mixed with quartz); Color: bright cyan-blue to green; Luster: vitreous to earthy; Crystal System: Monoclinic; Cleavage: none.

Formation & geological history

Forms in the oxidation zones of copper ore bodies where copper-bearing solutions react with silica. Often found in arid regions as secondary minerals.

Uses & applications

Primarily used as a minor ore of copper, as a gemstone for jewelry (cabochons), and as desirable mineral specimens for collectors.

Geological facts

Chrysocolla is often confused with turquoise but can be distinguished by its lower hardness and the way it sticks to the tongue due to its high silica/water content.

Field identification & locations

Look for the distinct blue-green color associated with copper deposits. It is commonly found in Arizona (USA), Chile, Democratic Republic of Congo, and Israel.

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