mineral

Pyrite

Iron Sulfide (FeS2)

AI-generated identification · may be incorrect

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

Hardness: 6-6

Identified July 29, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in a wide variety of geological environments, ranging from sedimentary rocks to hydrothermal veins and metamorphic rocks, often associated with other sulfides or oxides.

Uses & applications

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

Geological facts

Commonly known as 'Fool's Gold' due to its brassy yellow metallic luster resembling gold, though it is much harder and leaves a greenish-black streak.

Field identification & locations

Identified by its brass-yellow color, high specific gravity, metallic luster, cubic crystal habit (when well-formed), and a dark, greenish-black streak. Found worldwide.