mineral
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
Hardness: 6-6.5 on the Mohs scale; Color: Brass-yellow, tarnishing to dark brown or iridescent; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Indistinct; Specific Gravity: 4.8-5.0
- Hardness
- 6-6
- Color
- Brass-yellow, tarnishing to dark brown or iridescent
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 on the Mohs scale; Color: Brass-yellow, tarnishing to dark brown or iridescent; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Indistinct; Specific Gravity: 4.8-5.0
Formation & geological history
Forms in sedimentary, igneous, and metamorphic environments through the precipitation of iron and sulfur in reducing conditions.
Uses & applications
Used as a mineral specimen for collectors, historically used to strike fire, and occasionally in the production of sulfur dioxide and sulfuric acid.
Geological facts
Often referred to as 'Fool's Gold' due to its metallic luster and pale brass-yellow hue resembling gold.
Field identification & locations
Found worldwide in sedimentary rocks like shales, coal beds, and limestone, as well as hydrothermal veins. Identified by its brassy metallic look and high specific gravity.
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