mineral
Pyrite (or Arsenopyrite / Ore mineral aggregate)
FeS2 (Iron Sulfide)
Hardness: 6-6.5 on Mohs scale. Color: Metallic brassy-yellow to dark silvery-gray when tarnished. Luster: Metallic. Crystal Structure: Isometric/cubic or granular crystalline masses. Cleavage: Poor/indistinct.
- Hardness
- 6-6
- Color
- Metallic brassy-yellow to dark silvery-gray when tarnished
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 on Mohs scale. Color: Metallic brassy-yellow to dark silvery-gray when tarnished. Luster: Metallic. Crystal Structure: Isometric/cubic or granular crystalline masses. Cleavage: Poor/indistinct.
Formation & geological history
Forms in hydrothermal veins, sedimentary rocks under reducing conditions, metamorphic rocks, and magmatic segregations.
Uses & applications
Historically used as a source of sulfur and sulfuric acid. Popular as mineral display specimens and educational samples.
Geological facts
Often called 'Fool's Gold' due to its metallic luster and brassy yellow hue, though oxidization can give it a darker silvery or brownish crust.
Field identification & locations
Identified by its high density, metallic luster, brittleness, and dark greenish-black streak. Commonly found worldwide near mining sites, shale formations, and hydrothermal veins.
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