mineral

Likely weathered copper-bearing rock

Indeterminate from the photo; possibly malachite-bearing rock (Cu₂CO₃(OH)₂)

AI-generated identification · may be incorrect

Small rounded, mottled green-brown specimen with a dull to slightly shiny surface; hardness and crystal structure cannot be determined from the image. The green coloration may indicate copper minerals, but appearance alone is not diagnostic.

Identified October 5, 2026More mineral →

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Physical properties

Formation & geological history

If copper-bearing, it may have formed through oxidation and weathering of copper sulfide deposits; the specimen’s age and exact formation are unknown.

Uses & applications

Copper ores are mined for metal, while distinctive green specimens may be collected or used decoratively.

Geological facts

Green staining can be caused by several copper minerals, including malachite, chrysocolla, or altered copper-bearing host rock.

Field identification & locations

The image is too indistinct for a reliable identification. Check for a distinctly green streak or reaction to dilute acid only with appropriate safety precautions; laboratory testing is needed to confirm composition. Copper minerals occur in oxidized zones of deposits worldwide.