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 pyroxene Any of a group of dark, dense, rock-forming silicate minerals rich in calcium, iron, and magnesium and commonly found in basalt. The group includes augite, hypersthene, and diopside, with composition varying as a mixture of FeSiO3, MgSiO3, and CaSiO3. Pyroxenite is an igneous rock composed largely of pyroxene. 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