mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness of 6-6.5 on Mohs scale, brassy yellow color with a metallic luster, cubic crystal system, and a greenish-black streak.
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Physical properties
Hardness of 6-6.5 on Mohs scale, brassy yellow color with a metallic luster, cubic crystal system, and a greenish-black streak.
Formation & geological history
Formed in hydrothermal veins, sedimentary rocks, and metamorphic deposits across a wide range of geological ages.
Uses & applications
Used in the production of sulfur and sulfuric acid, historical fire-starting, and as a popular mineral specimen for collectors.
Geological facts
Familiar as 'fool's gold' due to its superficial resemblance to gold, pyrite often forms near precious metal deposits.
Field identification & locations
Identified by its brassy metallic color, high hardness, and cubic crystal habit; found worldwide in sedimentary and hydrothermal environments.
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Metamorphic
Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic