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 manganite Manganite Image source: Mineral Information Institute, courtesy of the Smithsonian Institution A black mineral consisting of hydrated manganese (III) oxide (MnO[OH]); an ore of manganese. Manganite forms as low-temperature veins and secondary deposits, and occurs as bundles of monoclinic system striated prisms, which are often crusts of small crystals. It is black or gray in color and has a metallic luster. It alters to pyrolusite. Manganite is found in western Europe, Michigan and California. Hardness 4, relative density 4.3. 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