mineral

Chrysocolla

Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O

Hardness: 2.5-3.5 (can be higher if silicated); Color: cyan, blue-green, green; Luster: Vitreous to dull; Crystal structure: Amorphous to Orthorhombic; Specific Gravity: 2.0-2.4

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

Identified May 2, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 (can be higher if silicated); Color: cyan, blue-green, green; Luster: Vitreous to dull; Crystal structure: Amorphous to Orthorhombic; Specific Gravity: 2.0-2.4

Formation & geological history

Formed in the oxidation zones of copper ore bodies where copper-bearing solutions react with silica and aluminum. It is a secondary mineral of copper.

Uses & applications

Used primarily as a minor copper ore, for ornamental carving, and in jewelry as a gemstone (often stabilized or as chrysocolla-in-chalcedony). Highly valued by mineral collectors.

Geological facts

The 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 associated with malachite, azurite, and turquoise.

Field identification & locations

Identify by its characteristic vibrant blue-green color and its tendency to stick to the tongue due to its porous nature. Commonly found in copper mines in Arizona (USA), Chile, and the DRC.