mineral
Pyrite
Iron Sulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 (Mohs scale), Color: Brass-yellow, Luster: Metallic, Crystal structure: Isometric (cubes, pyritohedrons), Cleavage: Indistinct, Specific Gravity: 4.9-5.2
- Hardness
- 6-6
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 (Mohs scale), Color: Brass-yellow, Luster: Metallic, Crystal structure: Isometric (cubes, pyritohedrons), Cleavage: Indistinct, Specific Gravity: 4.9-5.2
Formation & geological history
Formed in high and low-temperature hydrothermal veins, as an accessory mineral in igneous rocks, in contact metamorphic rocks, and in sedimentary rocks such as shale and coal. Found across all geological ages.
Uses & applications
Major source of sulfur for sulfuric acid production; historically used for firearms (wheel-lock); used in jewelry as 'marcasite'; popular for mineral collectors.
Geological facts
Commonly known as 'Fool's Gold' due to its resemblance to real gold. It can generate sparks when struck against steel, which made it vital for early fire-starting and firearms technology.
Field identification & locations
Identify by its brittle nature (gold is malleable) and its greenish-black streak (gold has a yellow streak). Found globally, with notable deposits in Spain, Italy, and the USA. Collectors look for well-defined cubic crystals.
