Complete mineralogical data for OLSACHERITE. Chemical Formula: Pb2(Se6+O4)(SO4). Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OLSENITE. Chemical Formula: KFe4(PO4)3. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OLSHANSKYITE. Chemical Formula: Ca2[B3O3(OH)6]OH·3H2O. Crystal System: Triclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OLYMPITE. Chemical Formula: Na5Li(PO4)2. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OMARINIITE. Chemical Formula: Cu8Fe2ZnGe2S12. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OKHOTSKITE. Chemical Formula: Ca2Mn2+Mn3+2[Si2O7][SiO4](OH)2(H2O). Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OKIEITE. Chemical Formula: Mg3(V10O28)(H2O)18·10H2O. Crystal System: Triclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OKRUGINITE. Chemical Formula: Cu2SnSe3. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OKRUSCHITE. Chemical Formula: Ca2Mn2+5Be4(AsO4)6(OH)4(H2O)2·4H2O. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for OLDHAMITE. Chemical Formula: CaS. Crystal System: Isometric. Learn about its geologic occurrence, habit, and identification.