GEOLOGY & PLANETARY SCIENCE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site pyrite Pyrite. Credit: Mineral Information Institute Also known as iron pyrites (Fe2S, iron (II) disulfide), a hard, yellow sulfide mineral sometimes called fool's gold because of its resemblance to gold. It occurs worldwide and is a major ore of sulfur. Pyrite crystallizes in the isomeric system, usually as cubes. It alters to goethite and limonite. Related category    • GEOLOGY AND PLANETARY SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP