mineral

Likely chrysocolla-bearing rock (blue-green copper mineral)

Chrysocolla, Cu₂H₂O₅Si (often mixed with malachite, quartz, or iron oxides)

AI-generated identification · may be incorrect

Elongate, rough, blue-green specimen with dull to slightly vitreous luster and irregular fracture. Chrysocolla is typically very soft, Mohs 2.5–3.5, non-cleaving, and has specific gravity about 2.0–2.4; exact properties vary because it is commonly a mineral mixture.

Identified September 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms as a secondary copper mineral in oxidized zones above copper sulfide deposits, commonly replacing or coating host rock. It is generally geologically young relative to its host deposit; the image alone cannot establish an age.

Uses & applications

Used as a decorative and lapidary material, in cabochons and carvings, and occasionally as a collector specimen; too soft for most everyday jewelry unless stabilized or protected.

Geological facts

The vivid color comes from hydrated copper minerals. Blue-green chrysocolla can resemble turquoise, but it is usually softer and more earthy, with less consistent color and texture.

Field identification & locations

Field tests: a copper-streaked blue-green color, earthy/porous texture, and low hardness—often scratched by a steel blade—favor chrysocolla. The reported central Afghanistan location is geologically plausible for copper-bearing oxidized mineralization, though turquoise and chrysocolla-malachite are alternatives.