
mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness of 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system with cubic or octahedral habits.
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Physical properties
Hardness of 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system with cubic or octahedral habits.
Formation & geological history
Forms in hydrothermal veins, sedimentary rocks, and metamorphic deposits through the precipitation of iron and sulfur.
Uses & applications
Used historically for ignition in firearms, currently in sulfur and sulfuric acid production, and popular in decorative mineral collections and jewelry.
Geological facts
Commonly known as 'Fool's Gold' due to its superficial resemblance to real gold, though it is harder and leaves a greenish-black streak.
Field identification & locations
Easily identified by its brassy metallic sheen, cubic crystals, and inability to be scratched by a steel knife. Found globally, notably in Peru, Spain, and the USA.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
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
Granite
Granite (Phaneritic intrusive igneous rock)
igneous