mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal Structure: Isometric (cubic, octahedral, pyritohedral). Cleavage: Indistinct. Specific gravity: 4.8-5.0.

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

Identified August 4, 2026More mineral →

Explore Pyrite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal Structure: Isometric (cubic, octahedral, pyritohedral). Cleavage: Indistinct. Specific gravity: 4.8-5.0.

Formation & geological history

Formed in a wide variety of geological environments, including hydrothermal veins, sedimentary rocks, and metamorphic rocks, often precipitating from sulfur-rich solutions at varying temperatures.

Uses & applications

Historically used to strike fire, 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 brassy metallic luster and golden hue, which has historically fooled many inexperienced prospectors into thinking it was actual gold.

Field identification & locations

Easily identified by its pale brass-yellow color, high specific gravity, metallic luster, dark greenish-black streak, and cubic or clustered crystal habits. Found worldwide.