mineral

Likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz-rich matrix; exact identification is uncertain from the image.

AI-generated identification · may be incorrect

Small, rounded, rough specimen with brassy-gold metallic flecks in a dark gray-brown matrix. Pyrite has Mohs hardness 6–6.5, cubic crystals, and no prominent cleavage; the surrounding material cannot be identified confidently.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Pyrite forms in many settings, including hydrothermal veins and sedimentary rocks, through mineral precipitation. Its age depends on the host rock and cannot be determined from appearance alone.

Uses & applications

Pyrite is collected as a mineral specimen and historically used as a source of sulfur and iron; it is not typically used as an iron ore today.

Geological facts

Its metallic golden color gives pyrite the nickname “fool’s gold.”

Field identification & locations

Look for a brassy color and metallic luster; pyrite is harder than gold and often occurs as cubic crystals, though this piece appears worn or matrix-bound. Common worldwide in veins and sedimentary deposits.