mineral
Pyrite Nodule
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system, conchoidal to uneven fracture, specific gravity 4.9-5.2.
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Physical properties
Hardness 6-6.5 on Mohs scale, pale brass-yellow color, metallic luster, isometric crystal system, conchoidal to uneven fracture, specific gravity 4.9-5.2.
Formation & geological history
Formed through precipitation of iron and sulfur in reducing environments within sedimentary rocks during diagenesis.
Uses & applications
Used historically for striking fire, in the manufacture of sulfur dioxide and sulfuric acid, and prized by mineral collectors.
Geological facts
Often called 'Fool's Gold' due to its superficial resemblance to real gold, pyrite nodules are commonly found in sedimentary layers like shales and chalks.
Field identification & locations
Easily identified by its brassy metallic luster, high density, and refusal to scratch easily with a knife; commonly found worldwide in sedimentary formations.
