mineral

Likely malachite-bearing copper ore

Possibly malachite (Cu₂CO₃(OH)₂) with dark copper-bearing host rock; identification is uncertain from the image

AI-generated identification · may be incorrect

Rough, mottled green and dark material with a dull to slightly waxy luster. Malachite has Mohs hardness 3.5–4, monoclinic crystals, and no prominent cleavage; the specimen’s hardness and composition cannot be confirmed visually.

Identified October 16, 2026More mineral →

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At a glance

Common name: Likely malachite-bearing copper ore
Scientific name: Possibly malachite (Cu₂CO₃(OH)₂) with dark copper-bearing host rock; identification is uncertain from the image
Category: mineral
Identified: October 16, 2026
Method: Standard

AI Estimated Value

Approximately $2–$20 for a small, common rough specimen; value depends on confirmed identity, size, and appearance.

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

Malachite forms when copper minerals weather and react with carbonate-bearing water near the surface, commonly in oxidized zones of copper deposits. The specimen’s age and exact formation setting are unknown.

Uses & applications

Malachite is used as an ornamental stone, in jewelry, and as a copper ore; this rough piece appears more suitable for collecting than industrial use.

Geological facts

Malachite often shows vivid green banding, but this specimen lacks clearly visible diagnostic banding, so other green copper minerals or host rock may be present.

Field identification & locations

Look for a vivid green streak and effervescence in dilute acid as clues to malachite; confirm with mineral testing, since color alone is not diagnostic. Copper deposits worldwide, including those in the Democratic Republic of the Congo, Russia, and the southwestern United States, yield malachite.