mineral

Pyrite

Iron Sulfide (FeS2)

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

Hardness: 6-6

Identified July 31, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in a wide variety of geological conditions, ranging from magmatic crystallization in igneous rocks to hydrothermal veins, sedimentary environments, and as a replacement mineral in fossils.

Uses & applications

Historically used to strike fire, currently used in the production of sulfur dioxide and sulfuric acid, and widely collected as a mineral specimen.

Geological facts

Commonly known as 'Fool's Gold' due to its superficial resemblance to gold, pyrite exhibits distinct cubic crystal habits and strikes sparks when hit with steel.

Field identification & locations

Identified in the field by its brassy yellow color, metallic luster, high specific gravity, and blackish green streak, often found worldwide in sedimentary, igneous, and metamorphic rocks.