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
Color: Pale brass-yellow
Luster: Metallic

Identified August 4, 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 settings, ranging from sedimentary rocks to hydrothermal vein deposits and metamorphic rocks, often formed in low-oxygen environments through the reaction of iron and sulfur.

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 superficial resemblance to gold, pyrite sparkles with a brassy metallic luster that has fooled many prospectors throughout history.

Field identification & locations

Easily identified by its pale brass-yellow color, metallic luster, high hardness (cannot be scratched by a knife easily), and cubic crystal habit or granular clusters. Found worldwide.