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

Pyrite

Iron Sulfide (FeS2)

AI-generated identification · may be incorrect

Hardness of 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system with cubic or octahedral habits.

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Physical properties

Hardness of 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system with cubic or octahedral habits.

Formation & geological history

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

Uses & applications

Used historically for ignition in firearms, currently in sulfur and sulfuric acid production, and popular in decorative mineral collections and jewelry.

Geological facts

Commonly known as 'Fool's Gold' due to its superficial resemblance to real gold, though it is harder and leaves a greenish-black streak.

Field identification & locations

Easily identified by its brassy metallic sheen, cubic crystals, and inability to be scratched by a steel knife. Found globally, notably in Peru, Spain, and the USA.