mineral

Chrysocolla-bearing copper ore

Chrysocolla (hydrated copper phyllosilicate), likely with malachite, quartz, and iron oxides

AI-generated identification · may be incorrect

Blue-green, earthy to dull/glassy luster with irregular massive texture; chrysocolla is typically Mohs 2.5–3.5, with no prominent cleavage and variable specific gravity around 2.0–2.4. The brown-gray matrix likely contains limonite or host rock.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms as a secondary copper-mineral deposit in oxidized zones above copper sulfide ores, commonly during weathering over millions of years. Exact age and locality cannot be determined from the photograph.

Uses & applications

Used as a decorative specimen and occasionally as a cabochon; copper ores are mined industrially, while chrysocolla has limited jewelry use because it is soft and porous. Common rough specimens generally have modest value.

Geological facts

The vivid blue-green color comes from hydrated copper; associated green malachite and blue azurite may occur in the same oxidation zone. It can resemble turquoise, but chrysocolla is generally softer and lacks turquoise’s waxy compactness.

Field identification & locations

Common in copper districts of Arizona, Nevada, Chile, Peru, Mexico, the Democratic Republic of Congo, and Australia. Field clues include blue-green color, earthy texture, copper staining, and possible reactions or color changes from acid tests; avoid acids on valuable pieces.