mineral

Likely pyrite-bearing rock

Pyrite (FeS₂) in a dark host rock; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Small, rough specimen with brassy metallic flecks in a dark matrix. Pyrite has Mohs hardness 6–6.5 and an isometric crystal structure; the host rock and its properties cannot be determined reliably from this view.

Identified October 5, 2026More mineral →

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Physical properties

Formation & geological history

Pyrite commonly forms in hydrothermal veins and sedimentary settings, where iron and sulfur combine; its age depends on the host deposit.

Uses & applications

Pyrite is collected as a mineral specimen and historically used as a source of sulfur and iron; this piece appears too small for practical industrial use.

Geological facts

Pyrite is often called “fool’s gold,” but its brassy color and brittle behavior distinguish it from malleable native gold.

Field identification & locations

Look for a brass-yellow metallic luster and, where crystals are visible, cubic faces; avoid identifying it by color alone. Pyrite occurs worldwide in many rock types.