mineral

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

AI-generated identification · may be incorrect

Irregular, coarse-grained fragment with dark gray to brassy metallic luster and apparent reflective sulfide grains. Likely hardness about 2.5–6.5 depending on mineral; cleavage, streak, and specific gravity are not determinable from the image.

Identified August 15, 2026More mineral →

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At a glance

Common name: Unidentified dark metallic sulfide specimen
Scientific name: Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Approximately $1–$15 as an unidentified common mineral fragment; potentially $20–$100+ if testing confirms an attractive or economically important ore mineral.

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

Probably a hydrothermal vein or sulfide-rich ore formed when hot mineral-bearing fluids precipitated metals in fractures, commonly during Paleozoic–Mesozoic or younger mineralization events.

Uses & applications

Such ores are sources of iron, copper, lead, zinc, or precious metals; attractive pieces may be collected, but this fragment is unlikely to have significant jewelry value.

Geological facts

The image does not show diagnostic crystal faces or enough detail for a reliable species-level identification. A magnet test, streak test, hardness test, density, and close examination of fresh surfaces would help distinguish sulfides from metallic meteorite material.

Field identification & locations

Common possibilities include pyrite (“fool’s gold”), chalcopyrite, galena, or mixed sulfide ore. Check whether it leaves a dark streak, tarnishes, is unusually heavy, or attracts a magnet; avoid powdered exposure because some sulfide minerals can release harmful compounds.