mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6-6.5 on the Mohs scale, Color: Pale brass-yellow, Luster: Metallic, Crystal System: Isometric, Cleavage: Indistinct, Specific Gravity: 4.8-5.0

Hardness: 6-6

Identified August 3, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on the Mohs scale, Color: Pale brass-yellow, Luster: Metallic, Crystal System: Isometric, Cleavage: Indistinct, Specific Gravity: 4.8-5.0

Formation & geological history

Formed in a wide variety of geological environments from hydrothermal veins to sedimentary rocks, often associated with coal beds and as a replacement mineral in fossils, spanning billions of years of geological history.

Uses & applications

Historically used to strike fire, currently used in the manufacture of sulfur and sulfuric acid, and popular among mineral collectors for its striking cubic crystal formations.

Geological facts

Commonly known as 'Fool's Gold' due to its brassy metallic luster and pale yellow hue which has often fooled inexperienced prospectors into mistaking it for real gold.

Field identification & locations

Easily identifiable in the field by its brassy yellow color, metallic luster, high specific gravity, conchoidal to uneven fracture, and characteristically striated cubic or pyritohedral crystal shapes.