mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 on Mohs scale; Color: brass-yellow; Luster: metallic; Crystal Structure: Isometric (cubic); Cleavage: Indistinct; Specific Gravity: 4.9-5.2
- Hardness
- 6-6
- Color
- brass-yellow
- Luster
- metallic
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: brass-yellow; Luster: metallic; Crystal Structure: Isometric (cubic); Cleavage: Indistinct; Specific Gravity: 4.9-5.2
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks via hydrothermal activity or precipitation from marine sediments in low-oxygen environments.
Uses & applications
Used as an ore to extract sulfur for sulfuric acid production; historically used in firearms (wheel-locks); popular as an ornamental stone and in jewelry.
Geological facts
Commonly known as Fool's Gold due to its resemblance to real gold; however, it is harder, more brittle, and creates a greenish-black streak when scratched compared to gold's yellow streak.
Field identification & locations
Identify by its metallic luster, golden color, and cubic crystal habits; commonly found in Spain, Peru, Italy, and the USA. Collectors look for well-defined cubes or dodecahedrons.
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