mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6.0-6.5 on Mohs scale. Color: brass-yellow to pale gold. Luster: bright metallic. Crystal System: isometric (cubic, pyritohedral). Cleavage: indistinct. Specific Gravity: 4.95-5.10.

Hardness: 6
Color: brass-yellow to pale gold
Luster: bright metallic

Identified July 22, 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: 6.0-6.5 on Mohs scale. Color: brass-yellow to pale gold. Luster: bright metallic. Crystal System: isometric (cubic, pyritohedral). Cleavage: indistinct. Specific Gravity: 4.95-5.10.

Formation & geological history

Forms in hydrothermal veins, sedimentary environments, and metamorphic rocks, as well as igneous intrusions through precipitation from sulfur-rich fluids.

Uses & applications

Historically used as a source of sulfur and sulfuric acid. Today it is popular among mineral collectors, used in ornamental jewelry (marcasite jewelry), and occasionally used in electronics like lithium batteries.

Geological facts

Famous for its nickname 'Fool's Gold' due to its bright golden metallic luster that frequently tricked amateur gold prospectors. Unlike real gold, pyrite is brittle, much harder, and leaves a greenish-black streak when scratched on porcelain.

Field identification & locations

Identify in the field by its brassy color, metallic sheen, high density, and brittle nature (leaves a dark greenish-black streak). Widely found globally, with notable deposits in Peru, Spain, Italy, and the USA.