mineral

Metallic sulfide mineral specimen, possibly pyrite

Likely pyrite (FeS₂), though the photograph is insufficient for certainty

AI-generated identification · may be incorrect

Small, irregular granular aggregate with brassy gray-gold metallic luster; pyrite has Mohs hardness 6–6.5, cubic crystal structure, poor cleavage, and specific gravity about 5.0. Color and form could overlap with chalcopyrite or other sulfides.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed by hydrothermal activity or sedimentary replacement, commonly in veins and sulfur-rich rocks; age depends on its host deposit and cannot be determined visually.

Uses & applications

Pyrite is collected, used historically as a sulfur source, and sometimes cut as an ornamental material; sulfide ores may be economically important for copper, lead, zinc, or gold.

Geological facts

Pyrite is commonly called “fool’s gold,” but it is harder and usually paler and less malleable than native gold.

Field identification & locations

Check for sharp cubic faces, a dark greenish-black streak, and resistance to scratching by steel; chalcopyrite is softer and more iridescent. Common worldwide, including Spain, Peru, China, and the United States.