mineral

Chrysocolla

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

Hardness: 2.5-3.5 (can be higher if silicated), Color: Cyan (blue-green) to emerald green, Luster: Vitreous to dull, Crystal structure: Amorphous/Monoclinic (usually massive), Cleavage: None

Hardness: 2

Identified June 11, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 (can be higher if silicated), Color: Cyan (blue-green) to emerald green, Luster: Vitreous to dull, Crystal structure: Amorphous/Monoclinic (usually massive), Cleavage: None

Formation & geological history

A secondary copper mineral formed in the oxidation zones of copper ore bodies where copper-bearing solutions react with silica-rich water.

Uses & applications

Primarily used as a minor ore of copper, as a gemstone for jewelry (cabochons and beads), and as a sought-after decorative specimen for mineral collectors.

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 found intergrown with quartz, malachite, or turquoise.

Field identification & locations

Identify by its vivid blue-green color and relative softness compared to turquoise. It is commonly found in arid regions like Arizona (USA), Chile, Peru, and the Democratic Republic of the Congo.

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sedimentary

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Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic