mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal Structure: Isometric (cubic). Cleavage: Poor. Specific Gravity: 4.8-5.0.

Hardness: 6-6
Color: Pale brass-yellow
Luster: Metallic

Identified July 31, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal Structure: Isometric (cubic). Cleavage: Poor. Specific Gravity: 4.8-5.0.

Formation & geological history

Formed in hydrothermal veins, sedimentary rocks, and metamorphic deposits under high pressure and temperature conditions, often dating from various geological eras.

Uses & applications

Used historically for producing sulfur and sulfuric acid, in early firearms (matchlock ignition), and widely collected as a mineral specimen.

Geological facts

Commonly known as 'Fool's Gold' due to its bright metallic yellow color which often fooled inexperienced prospectors.

Field identification & locations

Identified by its brassy yellow color, high density, cubic crystal habit, and dark green-black streak. Found worldwide in association with other metallic ores.