RockVault
Pyrite

Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)

cubiccommonSulfides

Pyrite

FeS2

This image displays several lustrous, pale brass-yellow octahedral pyrite crystals, exhibiting a distinct metallic sheen.

Pyrite Physical Properties

Mohs Hardness

6

Crystal System

cubic

Luster

metallic

Streak Color

greenish-black to brownish-black

Cleavage

indistinct/poor

Fracture

conchoidal to uneven

Specific Gravity

5

Colors

pale brass-yellow, golden

Transparency

opaque

Type Locality

Trabzon Province, Black Sea Region, Turkey

Mineral Group

Sulfides

Uses

sulfuric acid production, collector specimens, historically as 'fool's gold'

Associated Minerals

quartz, calcite, gold, chalcopyrite, sphalerite, galena

Rarity

common

Geological Context

Pyrite forms in a wide range of geological environments, including hydrothermal veins, sedimentary rocks, and metamorphic rocks, often under reducing conditions where iron and sulfur are present.