mineral

Likely rough pyrite specimen

Pyrite (FeS₂)

AI-generated identification · may be incorrect

Brassy yellow-brown metallic patches on a dark, irregular matrix; pyrite has Mohs hardness 6–6.5, a cubic crystal structure, and no prominent cleavage. The photo is not clear enough to confirm the identification or assess the specimen’s full appearance.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

Pyrite forms in many settings, including hydrothermal veins and sedimentary rocks, when iron and sulfur combine under low-oxygen conditions. Its age depends on the host deposit.

Uses & applications

Collected as a mineral specimen and historically used as a source of sulfur and, less commonly, iron; it is not typically used as jewelry because it can tarnish and fracture.

Geological facts

Its name comes from Greek for “fire,” since striking pyrite against steel can produce sparks. It is commonly mistaken for gold, but is harder and more brittle.

Field identification & locations

Look for a brassy metallic color, relatively high hardness, and brittle fracture; crystals are often cubic. Pyrite occurs worldwide, commonly in sedimentary rocks, coal beds, and hydrothermal veins.