mineral
Pyrite
Iron Sulfide (FeS2)
Hardness: 6-6.5 on Mohs scale; Color: brass-yellow, metallic gold; Luster: metallic; Crystal structure: isometric/cubic; Cleavage: indistinct; Specific gravity: approx. 5.0
- Hardness
- 6-6
- Color
- brass-yellow, metallic gold
- Luster
- metallic
Identified More mineral →
Explore Pyrite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-6.5 on Mohs scale; Color: brass-yellow, metallic gold; Luster: metallic; Crystal structure: isometric/cubic; Cleavage: indistinct; Specific gravity: approx. 5.0
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks via hydrothermal veins, contact metamorphism, or sedimentary precipitation. It can form in various environments including deep-sea vents and coal beds.
Uses & applications
Primarily used as an ore of sulfur for sulfuric acid production. It is also common in costume jewelry (often called marcasite), as a grounding stone in spiritual practices, and as a popular collector specimen.
Geological facts
Commonly known as Fool's Gold due to its resemblance to gold. Unlike gold, it is brittle and creates sparks when struck against steel. Ancient Romans used it for fire-starting.
Field identification & locations
Identify by its brassy color, cubic crystal habit, and greenish-black streak (gold has a yellow streak). Found globally, with notable deposits in Spain, Peru, and the USA.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous