mineral

Chrysocolla in Matrix

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

Hardness: 2.5-3.5 on Mohs scale (can be harder if silicated); Color: Cyan, turquoise blue, bluish-green; Luster: Vitreous to earthy; Crystal Structure: Monoclinic (usually amorphous/massive); Specific Gravity: 2.0-2.4.

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

Identified March 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed in the oxidation zones of copper ore bodies through the alteration of primary copper minerals by silica-rich water. It is a secondary mineral often found in arid climates.

Uses & applications

Primarily used as a minor copper ore and as a gemstone for jewelry, cabochons, and ornamental carvings. Highly valued by mineral collectors for its vibrant color.

Geological facts

The name comes from the Greek words 'chrysos' (gold) and 'kolla' (glue), referencing its historical use as a flux for soldering gold. It is often confused with turquoise but is generally softer.

Field identification & locations

Identify in the field by its distinct vivid blue-green color and its tendency to stick to the tongue due to its porous nature. Commonly found in Arizona (USA), Chile, and the DRC.

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