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 2, 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 environments, from hydrothermal veins to sedimentary rocks and metamorphic deposits, spanning a vast range of geological ages.

Uses & applications

Used historically as a source of sulfur and iron, currently used in the manufacture of sulfur dioxide 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 can produce sparks when struck against metal, which historically made it useful for fire-starting.

Field identification & locations

Easily identified by its brass-yellow color, metallic luster, high hardness (scratches glass, unlike real gold), and frequent cubic crystal habit. Found worldwide.