Rock Identifier
Pyrite (Iron Sulfide (FeS2)) — mineral
mineral

Pyrite

Iron Sulfide (FeS2)

AI-generated identification · may be incorrect

Hardness of 6 to 6.5 on the Mohs scale, brass-yellow color, metallic luster, isometric crystal system, and a greenish-black streak.

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Physical properties

Hardness of 6 to 6.5 on the Mohs scale, brass-yellow color, metallic luster, isometric crystal system, and a greenish-black streak.

Formation & geological history

Forms in hydrothermal veins, sedimentary rocks, and metamorphic deposits through the precipitation of iron and sulfur under reducing conditions.

Uses & applications

Used in the manufacture of sulfur and sulfuric acid, historical fire-starting, and as a popular specimen for mineral collectors.

Geological facts

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

Field identification & locations

Easily identified by its pale brass-yellow color, high specific gravity, metallic luster, and brittle cubic crystals.