mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6-6.5 on the Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (cubic). Streak: Greenish-black to brownish-black. Specific gravity: 4.8-5.0.

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

Identified July 31, 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 the Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (cubic). Streak: Greenish-black to brownish-black. Specific gravity: 4.8-5.0.

Formation & geological history

Forms in a wide variety of geological environments, ranging from sedimentary rocks to hydrothermal vein deposits and metamorphic rocks, often formed at high to low temperatures.

Uses & applications

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

Geological facts

Commonly known as 'Fool's Gold' due to its brassy metallic sheen resembling real gold, though it is much harder and lighter in weight than gold.

Field identification & locations

Easily identified by its brass-yellow color, high metallic luster, cubic crystal habit (when well-formed), and a dark streak compared to true gold. Found worldwide.