The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS2. Pyrite is the most common of the sulfide minerals. The name pyrite is derived from the Greek πυρίτης (purit¨¥s), “of fire” or "in fire”, from πύρ (pur), “fire”. Here you will find excellent quality pyrite beads. Wanna design your own jewelry? Check it out!