mineral

Pyrite

Iron Sulfide (FeS2)

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

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

Identified August 3, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in a wide variety of geological processes, ranging from magmatic segregation to hydrothermal veins and sedimentary environments, often associated with reducing conditions.

Uses & applications

Used historically as a source of sulfur and sulfuric acid, in modern times for manufacturing sulfur dioxide, and popularly as a mineral specimen for collectors and jewelry.

Geological facts

Commonly known as 'Fool's Gold' due to its superficial resemblance to gold, pyrite can actually contain trace amounts of real gold.

Field identification & locations

Identified by its brassy yellow color, metallic luster, dark streak, and higher hardness compared to real gold. Found worldwide in sedimentary, igneous, and metamorphic rocks.