mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs; Color: Pale brass-yellow/gold; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Poor/Indistinct; Specific Gravity: 4.8-5.0
- Hardness
- 6-6
- Color
- Pale brass-yellow/gold
- Luster
- Metallic
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Physical properties
Hardness: 6-6.5 Mohs; Color: Pale brass-yellow/gold; Luster: Metallic; Crystal Structure: Isometric; Cleavage: Poor/Indistinct; Specific Gravity: 4.8-5.0
Formation & geological history
Formed in igneous, metamorphic, and sedimentary environments. It creates from hydrothermal fluids or through biological activity in lack-of-oxygen marine sediments.
Uses & applications
Source of sulfur for sulfuric acid production; occasionally used in jewelry (marcasite); potential source of gold/lithium in specific ores; historically used to spark fires.
Geological facts
Known as 'Fool's Gold' due to its resemblance to gold; it is the most common sulfide mineral and can produce sparks when struck against steel.
Field identification & locations
Identify by its cubic crystal habit, high hardness (gold is soft), and blackish-green streak. Common worldwide in mining districts.
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