mineral

Pyrite

Iron Sulfide (FeS2)

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

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

Identified August 3, 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: Indistinct. Specific Gravity: 4.8-5.0.

Formation & geological history

Forms in a wide variety of geological environments, from hydrothermal veins to sedimentary rocks, through precipitation from aqueous solutions at various temperatures.

Uses & applications

Historically used to strike fire, currently used in the manufacture of sulfur and sulfuric acid, and popular among mineral collectors and in jewelry.

Geological facts

Commonly known as 'Fool's Gold' due to its metallic luster and pale brass-yellow hue, which has often deceived inexperienced prospectors.

Field identification & locations

Identified by its brassy yellow color, high specific gravity, cubic crystal habit, and dark streak. Found worldwide in sedimentary, igneous, and metamorphic rocks.