mineral

Tumbled polymetallic mineral specimen, likely chalcopyrite-bearing ore

Probable chalcopyrite (CuFeS₂) with quartz and iron-oxide minerals; exact identification is uncertain from the photograph

AI-generated identification · may be incorrect

Brassy bronze to coppery metallic patches occur in a dark matrix with pale quartz-like areas. Chalcopyrite has Mohs hardness 3.5–4, metallic luster, tetragonal crystals, poor cleavage, and specific gravity about 4.1–4.3; tarnish may create blue, purple, or brown colors.

Identified August 14, 2026More mineral →

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At a glance

Common name: Tumbled polymetallic mineral specimen, likely chalcopyrite-bearing ore
Scientific name: Probable chalcopyrite (CuFeS₂) with quartz and iron-oxide minerals; exact identification is uncertain from the photograph
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small common specimen; $30–$100+ for attractive, verified iridescent 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

Likely hydrothermal sulfide ore formed in veins or massive sulfide deposits during cooling of mineral-rich fluids; age depends on locality and cannot be determined visually.

Uses & applications

Copper ore and a popular mineral-collecting material; polished pieces are used decoratively, but this is generally not a gemstone or construction stone.

Geological facts

Chalcopyrite is commonly called “peacock ore” when artificially or naturally iridescent, though the visible colors may also reflect surface oxidation or coatings.

Field identification & locations

Look for metallic brassy color, high density, and a dark sulfide matrix; a streak, hardness, magnetism, and chemical tests would help distinguish chalcopyrite from bornite or metallic slag. Common worldwide in copper deposits.