mineral

Small metallic sulfide fragment, possibly pyrite-bearing ore

Likely pyrite (iron disulfide, FeS₂), though the image is insufficient for definitive identification

AI-generated identification · may be incorrect

Irregular brown-gold, metallic-looking fragment with possible crystalline faces; pyrite hardness 6–6.5 Mohs, brassy yellow color, metallic luster, cubic crystal system, and no prominent cleavage. The apparent dark tarnish or attached matrix may indicate weathering.

Identified September 17, 2026More mineral →

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At a glance

Common name: Small metallic sulfide fragment, possibly pyrite-bearing ore
Scientific name: Likely pyrite (iron disulfide, FeS₂), though the image is insufficient for definitive identification
Category: mineral
Identified: September 17, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a tiny common fragment; attractive, well-formed crystals can sell for $20–$200+.

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

Pyrite forms in hydrothermal veins and sedimentary rocks, including coal beds and shale, through sulfide mineral precipitation; specimens range from Precambrian to modern geological settings.

Uses & applications

Common pyrite has limited industrial value but is processed as a source of sulfur and sometimes recovered alongside gold or copper; attractive crystals are collected, but this tiny fragment has minimal commercial value.

Geological facts

Pyrite is nicknamed “fool’s gold,” but it is harder and typically more angular or crystalline than gold; its streak is greenish-black rather than gold-yellow.

Field identification & locations

Check for a greenish-black streak on unglazed porcelain, cubic crystal faces, and brittleness; gold is softer, malleable, and leaves a yellow streak. Common worldwide, especially in Peru, Spain, Italy, China, and the United States.