The mineral iron pyrite, is an iron sulfide.

This mineral’s metallic luster and pale brass-yellow hue have earned its nickname as ‘fool’s gold’ – since it has superficial resemblance to gold. The color has also led to the other nicknames such as brass, brazzle and Brazil.

Pyrite is the most common of the sulfide minerals.The name pyrite is derived from a Greek word meaning ‘fire’. In ancient Rome, several types of stones which could strike sparks of fire when struck against steel, were called pyrites.

Pyrite is usually found associated with other sulfides or oxides. Despite its nickname as fool’s gold, pyrite is sometimes found in association with small quantities of gold.

During the early years of the 20th century, pyrite was used in radio receivers as a mineral detector. It is still used in the crystal radio by those who have that hobby. Pyrite detectors can be as sensitive as the modern diode detectors.

Pyrite has been proposed as an inexpensive material for low cost photovoltaic solar panels. Synthetic iron sulfide is used with copper sulfide to create the experimental photovoltaic material.

Pyrite is used to make Marcasite jewelry. Made from small faceted pieces of pyrite set in silver, this jewelry was very popular in the Victorian era.