mineral

Copper-bearing rock, likely cuprite/malachite-bearing breccia

Cuprite (Cu₂O) with malachite [Cu₂CO₃(OH)₂], native copper, and iron oxides in a silicate host

AI-generated identification · may be incorrect

Hardness about 3.5–4 for cuprite and 3.5–4.5 for malachite; reddish-brown, greenish, and metallic-brassy patches with earthy to submetallic luster. The specimen appears massive and granular rather than showing distinct crystals; copper minerals commonly have high specific gravity.

Identified August 22, 2026More mineral →

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At a glance

Common name: Copper-bearing rock, likely cuprite/malachite-bearing breccia
Scientific name: Cuprite (Cu₂O) with malachite [Cu₂CO₃(OH)₂], native copper, and iron oxides in a silicate host
Category: mineral
Identified: August 22, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common rough hand specimen; $50–$300+ for confirmed, attractive cuprite/native-copper 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 in oxidized zones above copper sulfide ore deposits when groundwater alters primary copper minerals. It may be Precambrian to recent depending on the host deposit; age cannot be determined from the photograph.

Uses & applications

Primarily an ore and collector specimen; malachite may be used ornamentally and for pigments, while cuprite is valued for attractive crystals. The pictured rough material has limited jewelry suitability unless stabilized or cut.

Geological facts

The reddish material may be cuprite or iron-rich rock, while bright reflective flecks could be native copper, mica, or weathered sulfides; a photograph cannot confirm the identification.

Field identification & locations

Look for green/blue copper staining, unusually heavy weight, and a reddish streak; cuprite gives a red-brown streak, whereas malachite is green. Common localities include Arizona, Namibia, Chile, Russia, and Australia; acid and streak testing should be done cautiously.