mineral

Chrysocolla-rich copper ore

Chrysocolla (hydrated copper aluminosilicate), likely with malachite and copper oxides

AI-generated identification · may be incorrect

Blue-green to turquoise, mottled with dark brown/black iron or manganese oxides; typically dull to waxy and opaque. Chrysocolla is amorphous to microcrystalline, Mohs hardness about 2–4, with no consistent cleavage; exact properties vary with matrix minerals.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms as a secondary copper-mineral coating or replacement in oxidized zones above copper sulfide deposits, commonly alongside malachite, azurite, quartz, and limonite. Such specimens are generally geologically young relative to their host ore, often formed during weathering over millions of years.

Uses & applications

Used as a lapidary material for cabochons, carvings, and polished stones; attractive high-grade material may enter jewelry markets. Lower-grade pieces are mainly collectibles or decorative stones.

Geological facts

The vivid blue-green color comes from hydrated copper ions. Chrysocolla is commonly confused with turquoise, but it is generally softer and more irregularly patterned.

Field identification & locations

Identify by its blue-green color, soft/waxy appearance, irregular black-brown matrix, and association with copper minerals; a hardness or streak test helps distinguish it from turquoise. Common localities include Arizona, Nevada, Chile, Peru, Mexico, and the Democratic Republic of the Congo.