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**Chemical formula:** FeS₂ **Chemical name:** Iron disulfide **Mohs scale hardness:** 6‒6.5 **Molar mass:** 120 g/mol **Crystal system:** Cubic **Unit cell:** Pyrite has a cubic face-centered arrangement of iron cations, with sulfur anions forming S₂ complexes that occupy the center of the lattice and serve as connectors between the iron cations. **Crystal habit:** Pyrite typically forms as cubes or dodecahedrons. **Description:** Pyrite is often recognized for its metallic, golden appearance, which has earned it the nickname "fool's gold." It is the most prevalent sulfide mineral. **Applications:** Historically, pyrite was used in the production of sulfuric acid and iron.
