mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Hardness: 2.5-7.0 (highly variable); Color: Cyan, blue-green, or green; Luster: Vitreous to dull; Crystal Structure: Amorphous/Monoclinic; Specific Gravity: 2.0-2.4

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

Identified March 11, 2026More mineral →

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Physical properties

Hardness: 2.5-7.0 (highly variable); Color: Cyan, blue-green, or green; Luster: Vitreous to dull; Crystal Structure: Amorphous/Monoclinic; Specific Gravity: 2.0-2.4

Formation & geological history

Formed as a secondary mineral in the oxidation zones of copper ore bodies. It occurs often as a result of water altering primary copper sulfides into silicates. It is typically found in arid regions such as the Southwestern United States, Chile, and the DRC.

Uses & applications

Used primarily as a gemstone for cabochons and jewelry, an ornamental stone in carvings, and historically as a minor copper ore. It is also highly valued by mineral collectors for its vibrant color.

Geological facts

Its name comes from the Greek 'chrysos' (gold) and 'kolla' (glue), referring to its ancient use as a flux for soldering gold. It is often found intermixed with other minerals like quartz or chalcedony, which increases its hardness and transparency.

Field identification & locations

Identify in the field by its distinct vibrant teal color and its tendency to stick to the tongue due to its high water content and porosity. Commonly located alongside malachite and azurite in copper mining districts.

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