mineral

Pyrite

Iron Sulfide (FeS2)

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

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

Identified August 6, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale; Color: Pale brass-yellow; Luster: Metallic, gleaming; Crystal Structure: Isometric; 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 coal beds, through low to high temperatures.

Uses & applications

Used historically for striking fire, in the manufacture of sulfur and sulfuric acid, and popularly as a collector mineral and in jewelry.

Geological facts

Commonly known as 'Fool's Gold' due to its superficial resemblance to gold, pyrite has been mistaken for the precious metal by many inexperienced prospectors.

Field identification & locations

Easily identified by its brass-yellow color, metallic luster, high specific gravity, and blackish green streak, typically found worldwide in association with other sulfides and oxides.