mineral

Iron sulfide-rich ore, possibly pyrite-bearing gossan

Likely pyrite (FeS₂) with iron oxides/hydroxides and host rock; exact identification requires testing

AI-generated identification · may be incorrect

Brassy yellow metallic patches contrast with dark gray-purple, earthy material; likely Mohs 6–6.5 for pyrite, with metallic luster and cubic crystal structure, though much is massive or weathered. Specific gravity may be roughly 4.8–5.0 where pyrite is abundant.

Identified August 10, 2026More mineral →

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At a glance

Common name: Iron sulfide-rich ore, possibly pyrite-bearing gossan
Scientific name: Likely pyrite (FeS₂) with iron oxides/hydroxides and host rock; exact identification requires testing
Category: mineral
Identified: August 10, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common hand specimen; $50–$200+ if crystals, locality, or unusual associated minerals are verified.

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 formed by hydrothermal mineralization or sulfide-vein oxidation; geological age cannot be determined from the photograph. Weathering of sulfides commonly produces yellow-brown iron oxyhydroxides and porous gossan.

Uses & applications

Used historically as a sulfur and iron source and commonly collected as an ore specimen; unattractive or weathered material generally has little jewelry or construction value.

Geological facts

Pyrite is often called “fool’s gold,” but its brassy color and high hardness distinguish it from native gold. Acid drainage can develop when sulfide-rich ore weathers.

Field identification & locations

Identify with a streak test, hardness test, density, and ideally X-ray diffraction: pyrite gives a dark greenish-black streak and does not scratch easily with steel. Common in hydrothermal veins, sedimentary beds, and metamorphic sulfide deposits worldwide.