mineral
Pyrite
Iron Sulfide (FeS2)
Hardness: 6-6.5 on the Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (cubic, octahedral, pyritohedral). Cleavage: Indistinct. Specific gravity: 4.8-5.0.
- Hardness
- 6-6
- Color
- Pale brass-yellow
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 on the Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (cubic, octahedral, pyritohedral). Cleavage: Indistinct. Specific gravity: 4.8-5.0.
Formation & geological history
Forms in a wide variety of geological environments, from igneous and metamorphic rocks to sedimentary deposits like shales and coal beds, often precipitated from hydrothermal solutions.
Uses & applications
Historically used to strike fire, currently used in the manufacture of sulfur and sulfuric acid, and popular among mineral collectors and in jewelry.
Geological facts
Widely known as 'Fool's Gold' because of its metallic golden luster which often fools inexperienced prospectors into thinking it is real gold.
Field identification & locations
Easily identified by its brass-yellow color, high specific gravity, metallic luster, and the distinctive blackish-green streak. Common worldwide, with famous deposits in Peru, Spain, and the USA.
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