mineral

Pyrite

Iron Sulfide (FeS2)

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

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

Identified July 29, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in a wide variety of geological environments, from sedimentary rocks to hydrothermal veins and metamorphic rocks, often under reducing conditions.

Uses & applications

Historically used to strike fire, currently used in the manufacture of sulfur and sulfuric acid, and popularly collected as a mineral specimen or used in jewelry.

Geological facts

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

Field identification & locations

Easily identified by its brassy yellow color, high specific gravity, metallic luster, and characteristic cubic or pyritohedral crystal forms, often found worldwide in sedimentary, igneous, and metamorphic rock formations.