O Listing of Minerals

O Index of Mineral Species

This alphabetical listing of O minerals include synonyms of accepted mineral names, pronunciation of that name, name origins, and locality information. Visit our expanded selection of mineral pictures.

O'danielite *  (see Odanielite ) See Also: GOOGLE, Athena, MinDAT, MinMax Obertiite !     NaNa2(Mg3Fe+++Ti)Si8O22(O,F,OH)2 NAME ORIGIN: Named for Dr. Roberta Oberti (1951-), Pavia, Italy, for her contributions to the understanding of the crystal chemistry of the amphibole group. Oboyerite     Pb6H6(Te++++O3)3(Te++++++O6)2 • 2(H2O) NAME ORIGIN: Named for O. (Oliver) Boyer, one of the men who first staked the Grand Central lode claim in the Tombstone district, Arizona, USA. Obradovicite     H4(K,Na)Cu++Fe+++2(AsO4)(MoO4)5 • 12(H2O) NAME ORIGIN: Named for Martin T. Obradovic, who provided the type material. Obruchevite *  (see Yttropyrochlore-(Y) ) See Also: GOOGLE, Athena, MinDAT, MinMax Octahedrite *  (see Anatase ) See Also: GOOGLE, Athena, MinDAT, MinMax Odanielite     Na(Zn,Mg)3H2(AsO4)3 Odinite     (Fe+++,Mg,Al,Fe++,Ti,Mn)2.5(Si,Al)2O5(OH)4 NAME ORIGIN: Named for Gilles Serge Odin, clay mineralogist of the University P. And M. Curie, Paris, France. Odintsovite     K2Na4Ca3Ti2Be4Si12O38 NAME ORIGIN: For Prof. M. M. Odintsova (1911-1979), a founder of the Institute of the Earth's Crust, Irkutsk. Oellacherite *  (see Ganterite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oenite !     CoSbAs NAME ORIGIN: For Prof. Dr. Ing Soen Oen (1928-1996), Professor of Petrology, Mineralogy and Ore Geology at the University of Amsterdam. Oerebroite *  (see Orebroite-III ) See Also: GOOGLE, Athena, MinDAT, MinMax Oerebroite *  (see Orebroite-VIII ) See Also: GOOGLE, Athena, MinDAT, MinMax Offretite     (K2,Ca,Mg)2.5Al5Si13O36 • 15(H2O) NAME ORIGIN: Named for Albert Jules Joseph Offret (1857-?), professor in the Faculty of Sciences, Lyon, France. Ogdensburgite     Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)6 • 6(H2O) NAME ORIGIN: Named for the locality. LOCALITY: Sterling Hill mine, Ogdensburg, New Jersy, USA. Ohmilite     Sr3(Ti,Fe+++)(Si2O6)2(O,OH) • 2-3(H2O) Ojuelaite     ZnFe+++2(AsO4)2(OH)2 • 4(H2O) NAME ORIGIN: Named for the locality. LOCALITY: Ojuela mine, Mapimi, Durango, Mexico. Okanoganite-(Y)     (Na,Ca)3(Y,Ce)12Si6B2O27F14 NAME ORIGIN: Named for the locality. LOCALITY: Golden Horn Batholith, near Washington Pass, Okanongan County, Washington. Okayamalite !     Ca2B2SiO7 NAME ORIGIN: Named after it's locality. LOCALITY: The Fuka mine, Bicchu-cho, Okayama Prefecture, Japan. Okenite     Ca3[Si6O15] • 6(H2O) NAME ORIGIN: Named for Lorenz Oken (1779-1851), German natural historian, Munich Germany. Okhotskite-(Mg) *     Ca3(Mg,Mn++)(Mn+++,Al,Fe+++)(SiO4)(Si2O7)(OH)2 • (H2O) NAME ORIGIN: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located. Okhotskite-(Mn++)     Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4 NAME ORIGIN: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located. Oldhamite     (Ca,Mg,Fe)S NAME ORIGIN: Named for Thomas Oldham (1816-1878), Director of the Indian Geologial Survey (185o-1876). Olekminskite     Sr(Sr,Ca,Ba)(CO3)2 Olenite !     NaAl3Al6(BO3)3(Si6O18)(O,OH)4 NAME ORIGIN: Named for the locality. LOCALITY: Decembrist pegmatite field, Olenik River Basin, Russia. Olenite - (61.3.1.7) *  (see Olenite ) See Also: GOOGLE, Athena, MinDAT, MinMax Olgite     Na(Sr,Ba)PO4 NAME ORIGIN: Named for Olga Anisimovne-Vorobiova (1902-1974), Russian mineralogist. Olgite-Ba *  (see Bario-olgite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oligoclase     (Na,Ca)(Si,Al)4O8 NAME ORIGIN: From the Greek, oligos and kasein, "little cleavage." Olivenite     Cu2AsO4(OH) NAME ORIGIN: From the German olivernerz, literally "olive" ore, in allusion to its typical color. Olivine *     (Mg,Fe)2SiO4 NAME ORIGIN: Named after the green color. Olivine *  (see Forsterite ) See Also: GOOGLE, Athena, MinDAT, MinMax Olkhonskite     (Cr+++,V+++)2Ti3O9 NAME ORIGIN: For the locality. LOCALITY: On the western shore of Lake Baikal, 4.5 km south of the Olkhon Island, Russia. Olmsteadite     KFe++2(Nb,Ta)(PO4)2O2 • 2(H2O) NAME ORIGIN: Named for Milo Olmstead, micromount mineral collector, Rapid City, South Dakota, USA. Olsacherite     Pb2(SeO4)(SO4) NAME ORIGIN: Named for Juan A. Olsacher (1903-1964), Argentine mineralogist, University of Cordoba. Olshanskyite     Ca2[B3O3(OH)6]OH • 3(H2O) NAME ORIGIN: Named for Yakov I. Olshansky (1912-1958), Russian geochemist. Olympite     LiNa5(PO4)2 Omeiite     (Os,Ru)As2 NAME ORIGIN: Named for the locality. LOCALITY: Danba, Omeishan Mt, Sichuan (Szechuan), China, Ominelite !     (Fe++,Mg)Al3BSiO9 NAME ORIGIN: Named after the locality. LOCALITY: Omine Mountains near the misen River at Tenkawa, Yoshio, Nara Prefecture, Japan. Omphacite     (Ca,Na)(Mg,Fe++,Al)Si2O6 NAME ORIGIN: From the Greek for "unripe grapes", in allusion to its green color. Oneillite !     Na15Ca3Mn3Fe++3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 NAME ORIGIN: Named after John Johnston O’Neill (1886-1966), geologist with the Geological Survey of Canada, Ottawa, and later, Professor of geology, Dean of Science and Dean of Engineering at McGill U Onofrite(Se) *  (see Metacinnabar ) See Also: GOOGLE, Athena, MinDAT, MinMax Onoratoite     Sb8O11Cl2 NAME ORIGIN: Named for Ettore Onorato (1899-1971), Italian mineralogist, University of Rome, Italy. Oosterboschite     (Pd,Cu)7Se3 NAME ORIGIN: Named for M. R. Oosterbosch, (1908-), Belgian mining engineer. Opal     SiO2 • n(H2O) NAME ORIGIN: From the Old Indian upala - "precious stone." Orange bornite *  (see Renierite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orangite *  (see Thorite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orcelite     Ni5-xAs2 (x=0.23) NAME ORIGIN: Named for Jean Orcel (1896-1978), French mineralogist. Ordonezite     ZnSb2O6 NAME ORIGIN: Named for Ezequiel Ordonez (1867-1950), Mexican geologist. Orebroite-III     Mn++6(Fe+++,Sb+++++)2Si2(O,OH)14 NAME ORIGIN: Named for the locality. LOCALITY: Sjogruvan, Grythyttan, Orebro, Sweden. Orebroite-VIII     Mn++3(Sb+++++,Fe+++)SiO4(O,OH)3 NAME ORIGIN: Named for the locality. LOCALITY: At the Sjo mine, near Grythyttan, Orebro, Sweden. Oregonite     Ni2FeAs2 NAME ORIGIN: Named for the state of Oregon, USA. Organovaite-Mn !     K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 • 6(H2O) NAME ORIGIN: Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Mn end-member. Organovaite-Zn !     K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 • 6(H2O) NAME ORIGIN: Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Zn end-member. Orickite     CuFeS2 • (H2O) NAME ORIGIN: Named for the locality. LOCALITY: Coyote Peak diatreme, 16 miles SW of Orick, Santa Cruz Co., California. Orientite     Ca2Mn++Mn+++2Si3O10(OH)4 NAME ORIGIN: Named after its locality. LOCALITY: Oriente Province, Cuba. Orlandiite !     Pb3(Cl,OH)4(SeO3) • (H2O) NAME ORIGIN: Named for mineralogist Paolo Orlandi (1946-) of the University of Pisa, Italy. Orlymanite     Ca4Mn++3Si8O20(OH)6 • 2(H2O) NAME ORIGIN: Named for Orlando P. Lyman (1903-1986), founder of Lyman House Memorial Museum, Hilo, Hawaii. Oro *  (see Gold ) See Also: GOOGLE, Athena, MinDAT, MinMax Orpheite     PbAl3(PO4,SO4)2(OH)6 (?) Orpiment     As2S3 NAME ORIGIN: From the Latin, auripigmentum, in allusion to the vivid golden hue. Orschallite     Ca3(SO3)2SO4 • 12(H2O) Orthite *  (see Allanite-(Ce) ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthite *  (see Allanite-(La) ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthite *  (see Allanite-(Y) ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthoantigorite *  (see Lizardite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthobrannerite     U++++U++++++Ti4O12(OH)2 Orthobrannerite *  (see Brannerite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthochamosite     (Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8 NAME ORIGIN: Named as the orthorhombic analogue of chamosite. Orthochevkinite *     (Ce,La,Ca,Na,Th)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22 NAME ORIGIN: Named as a possible orthorhombic form of chevkinite. Orthochrysotile     Mg3Si2O5(OH)4 NAME ORIGIN: From the orthorhombic crystal symmetry and Greek chrysos - "gold" and tilos - "fiber." Orthoclase     KAlSi3O8 NAME ORIGIN: From the Greek orthos - "right" and kalo -" I cleave" in allusion to the mineral's right angle of good cleavage. Orthoenstatite *  (see Enstatite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthoericssonite     BaMn2(Fe+++O)Si2O7(OH) Orthoferrosilite *  (see Ferrosilite ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthojoaquinite-(Ce)     NaFe++Ba2Ce2Ti2[Si4O12]2 O2(OH) • (H2O) NAME ORIGIN: Named after its orthorhombic crystal structure and the relationship to joaquinite (named for Joaquin Ridge, Diablo Range, California, USA). Orthojoaquinite-(La) !     Ba2Na(La,Ce)2Fe++Ti2Si8O26(OH,O,F) • H2O NAME ORIGIN: Named as the La analog of orthojoaquinite. Orthominasragrite !     VO(SO4) • 5(H2O) NAME ORIGIN: Named for the polymorphic relationship to minasragrite. Orthopinakiolite     (Mg,Mn++)2Mn+++BO5 Orthose *  (see Orthoclase ) See Also: GOOGLE, Athena, MinDAT, MinMax Orthoserpierite     Ca(Cu,Zn)4(SO4)2(OH)6 • 3(H2O) NAME ORIGIN: Named for its stuctural rellationship to serpierite. Orthowalpurgite     (UO2)Bi4O4(AsO4)2 • 2(H2O) NAME ORIGIN: It is an orthorhombic polymorph of walpurgite. Osarizawaite     PbCuAl2(SO4)2(OH)6 NAME ORIGIN: Named for the locality. LOCALITY: Osarizawa mine, Akita Prefecture, Japan. Osarsite     (Os,Ru)AsS NAME ORIGIN: Named after it's chemical composition of osmium and arsenic. Osbornite     TiN NAME ORIGIN: For George Osborn, who sent to London the meteorite in which the species was found. Osmiridium *  (see Iridium ) See Also: GOOGLE, Athena, MinDAT, MinMax Osmium     (Os,Ir) NAME ORIGIN: Named for the principle element in the composition. Osumilite *  (see Osumilite-(Fe) ) See Also: GOOGLE, Athena, MinDAT, MinMax Osumilite-(Fe)     (K,Na)(Fe++,Mg)2(Al,Fe+++)3(Si,Al)12O30 NAME ORIGIN: Named for the locality. LOCALITY: Historic province of Osumi in Sakkabira, Kyushu, Japan. Osumilite-(Mg)     (K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30 NAME ORIGIN: Named for the locality and the composition. LOCALITY: Historic province of Osumi in Sakkabira, Kyushu, Japan. Oswaldpeetersite !     (UO2)2CO3(OH)2 • 4(H2O) NAME ORIGIN: Named for Maurice Oswald Peeters (1945-), structural crystallographer at the University of Leuven, Belgium. Otavite     CdCO3 NAME ORIGIN: Named after its locality. LOCALITY: Tsumeb, near Otavi (Namibia). Otjisumeite     PbGe4O9 NAME ORIGIN: Named for the Herrero tribe name of the locality, Tsumeb. LOCALITY: Tsumeb mine, Namibia. Ottemannite     Sn2S3 NAME ORIGIN: Named for J. Ottemann, German mineralogist, Heidelberg, Germany. Ottrelite     (Mn,Fe++,Mg)2Al4Si2O10(OH)4 NAME ORIGIN: Named for the locality. LOCALITY: In Belgium, in the Ardennes Mountains, from Ottre, Salmchateau, and Veilsalm. Otwayite     Ni2(CO3)(OH)2 • (H2O) NAME ORIGIN: Named after Charles Albert Otway (1922-), miner and prospector of Cosnells, WA, Australia. Oulankaite !     (Pd,Pt)5(Cu,Fe)4SnTe2S2 NAME ORIGIN: Named after the Oulanka river, which is near the occurrence. Oulongaite *  (see Oulankaite ) See Also: GOOGLE, Athena, MinDAT, MinMax Ourayite     Pb4Ag3Bi5S13 NAME ORIGIN: Named for the locality. LOCALITY: Old Lout mine, Ouray, Colorado. USA. Oursinite     (Co,Mg)(H3O)2[(UO2)SiO4]2 • 3(H2O) NAME ORIGIN: Named from the French "oursin", sea urchin, in allusion to the radiating habit of the acicular crystals. Ovamboite !     Cu20(Fe,Cu,Zn)6W2Ge6S32 NAME ORIGIN: Named for the locality. LOCALITY: Tsumeb deposit, Ovamboland, Namibia, and (2) the Maikain deposit, Kazakhstan. Overite     CaMgAl(PO4)2(OH) • 4(H2O) Owensite     (Ba,Pb)6(Cu,Fe,Ni)25S27 NAME ORIGIN: For DeAlton R. Owens (1934- ), Canada Centre for Mineral and energy Technology. Owyheeite     Pb7Ag2(Sb,Bi)8S20 NAME ORIGIN: Named after its locality. LOCALITY: Poorman Mine, Silver City district, Owyhee County, Idaho, USA. Oxammite     (NH4)2(C2O4) • (H2O) Oxiberaunite *     (Fe+++,Mn+++)Fe+++5(PO4)4O(OH)4 • 6(H2O) Oxyberaunite *  (see Beraunite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oxyhornblende *  (see Ferrohornblende ) See Also: GOOGLE, Athena, MinDAT, MinMax Oxyhornblende *  (see Ferrokaersutite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oxyjulgoldite *  (see Julgoldite-(Fe+++) ) See Also: GOOGLE, Athena, MinDAT, MinMax Oxykertschenite *  (see Metavivianite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oxypetscheckite *  (see Petscheckite ) See Also: GOOGLE, Athena, MinDAT, MinMax Oyelite     Ca10B2Si8O29 • 12(H2O) NAME ORIGIN: Named for Jiro Oye (1900-1968), professor of mineralogy, Okayama University, Japan.

Index A Minerals Index B Minerals Index C Minerals Index D Minerals Index E Minerals Index F Minerals Index G Minerals Index H Minerals Index I Minerals Index J Minerals Index K Minerals Index L Minerals Index M Minerals Index N Minerals Index O Minerals Index P Minerals Index Q Minerals Index R Minerals Index S Minerals Index T Minerals Index U Minerals Index V Minerals Index W Minerals Index X Minerals Index Y Minerals Index Z Minerals All LEGEND Minerals identified with this icon have a sound file, courtesy of The Photo-Atlas of Minerals, which gives the pronunciation of the mineral name. Minerals identified with this icon have an image or picture in the database which may be viewed. Minerals identified with this icon have a Java crystal form, created with the program JCrystal, which can be manipulated and rotated. This icon links the mineral to the locality-rich information contained in Mindat.org. Minerals identified with this icon are radioactive. - Detectable with very sensitive instruments, - very mild, - weak, - strong, - very strong, - dangerous. * Mineral Name is Not IMA Approved. ! New Dana Classification Number Has Been Changed or Added. ? IMA Discredited Mineral Species Name.

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