mineral

Polished copper-bearing mineral specimen, likely malachite-rich copper ore

Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite

AI-generated identification · may be incorrect

Green, yellow-brown, and dark banding with earthy to silky luster; likely Mohs hardness 3.5–4, opaque, and non-cleavable in this polished form. The image does not clearly show diagnostic crystal structure.

Identified August 8, 2026More mineral →

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At a glance

Common name: Polished copper-bearing mineral specimen, likely malachite-rich copper ore
Scientific name: Malachite, Cu₂CO₃(OH)₂, possibly mixed with chrysocolla or limonite
Category: mineral
Identified: August 8, 2026
Method: Standard

AI Estimated Value

Approximately $10–$100 for a common polished specimen; $100–$500+ for large, strongly patterned, high-quality material.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms as a secondary copper mineral in oxidized zones above copper sulfide deposits, commonly during weathering of copper ores; generally Phanerozoic or older depending on the host deposit.

Uses & applications

Used as an ornamental and lapidary stone, pigment, cabochon material, and collector specimen; not typically used as an industrial copper ore when finely polished.

Geological facts

Malachite commonly displays concentric or wavy green banding, while yellow-brown areas may indicate limonite, chrysocolla, or matrix minerals. Avoid ingesting dust or using it for food-contact objects because copper minerals can be toxic.

Field identification & locations

Look for vivid green concentric banding, opaque color, relatively low hardness, and possible reaction to dilute acid; field identification is uncertain from the photograph alone. Common sources include the Democratic Republic of Congo, Zambia, Russia, Australia, and the southwestern United States.