mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric. Cleavage: Indistinct. Specific gravity: 4.9-5.2.
- Hardness
- 6-6
- Color
- Pale brass-yellow
- Luster
- Metallic
Identified More mineral →
Explore Pyrite (Fool's Gold) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-6.5 Mohs. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric. Cleavage: Indistinct. Specific gravity: 4.9-5.2.
Formation & geological history
Formed in diverse geological settings, including hydrothermal veins, sedimentary rocks through biological reduction of sulfates, and as an accessory mineral in igneous rocks.
Uses & applications
Historically a source of sulfur and sulfuric acid. Today, it is used in the manufacture of lithium batteries, as a mineral specimen for collectors, and occasionally in jewelry (often incorrectly called marcasite).
Geological facts
It is nicknamed Fool's Gold due to its visual similarity to gold, though it is much harder and more brittle. It can create sparks when struck against steel.
Field identification & locations
Identify by its brassy color, metallic luster, and blackish-green streak on a porcelain plate. It is found globally, with notable deposits in Spain, Italy, and Peru.
