Mineralogy Database

O Listing of Minerals

Search Webmineral :
  
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O Minerals] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] 

O Mineral Index (116 Count)

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

LEGEND: Valid Species (Bold);  Pronunciation;  Mineral Image;  Mineral Image Gallery;  jCrystal Form;  jPOWD Form;          Calculated Radioactive Intensity

O Mineral Pages: [1] [2]
Oboyerite Say Oboyerite Pb6H6(Te++++O3)3(Te++++++O6)2·2(H2O) Approved IMA 1979
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 Say Obradovicite  View Obradovicite Image  H4(K,Na)Cu++Fe+++2(AsO4)(MoO4)5·12(H2O) Approved IMA 1986
NAME ORIGIN: Named for Martin T. Obradovic, who provided the type material.
Obruchevite - See Yttropyrochlore-(Y)
Octahedrite - See Anatase
Odanielite Say Odanielite Na(Zn,Mg)3H2(AsO4)3 Approved IMA 1980
NAME ORIGIN: Named for Herbert O’Daniel (1903-1977), Professor of Mineralogy, University of Munich, Munich, Germany, and Editor of Neues Jahrbuch fur Mineralogie.
O'danielite - See Odanielite
Odinite Say Odinite (Fe+++,Mg,Al,Fe++,Ti,Mn)2.5(Si,Al)2O5(OH)4 Approved IMA 1988
NAME ORIGIN: Named for Gilles Serge Odin, clay mineralogist of the University P. And M. Curie, Paris, France.
Odintsovite Say Odintsovite    K2Na4Ca3Ti2Be4Si12O38 Approved IMA 1995
NAME ORIGIN: For Prof. M. M. Odintsova (1911-1979), a founder of the Institute of the Earth's Crust, Irkutsk.
Oellacherite - See Ganterite
Oenite Say Oenite CoSbAs Approved IMA 1998 (Dana # Added)
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-VIII
Oerebroite - See Orebroite-III
Offretite Say Offretite  View Offretite Image   (K2,Ca,Mg)2.5Al5Si13O36·15(H2O) Valid Species (Pre-IMA) 1890
NAME ORIGIN: Named for Albert Jules Joseph Offret (1857-?), professor in the Faculty of Sciences, Lyon, France.
Oftedalite   (Sc,Ca)2KBe3Si12O30 Approved IMA 2004 (Dana # Added)
NAME ORIGIN: Named for Ivar Oftedal (1894-1976), former Professor of Mineralogy at the Institute of Geology, University of Oslo, Norway.
Ogdensburgite Say Ogdensburgite  View Ogdensburgite Image Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)6·6(H2O) Approved IMA 1981
NAME ORIGIN: Named for the locality. LOCALITY: Sterling Hill mine, Ogdensburg, New Jersy, USA.
Ohmilite Say Ohmilite  View Ohmilite Image  Sr3(Ti,Fe+++)(Si2O6)2(O,OH)·2-3(H2O) Approved IMA 1973
NAME ORIGIN: Named for the locality. LOCALITY: From Ohmi, Niigata Prefecture, Japan.
Ojuelaite Say Ojuelaite  View Ojuelaite Image  ZnFe+++2(AsO4)2(OH)2·4(H2O) Approved IMA 1981
NAME ORIGIN: Named for the locality. LOCALITY: Ojuela mine, Mapimi, Durango, Mexico.
Okanoganite-(Y) Say Okanoganite-(Y)  View Okanoganite-(Y) Image   (Na,Ca)3(Y,Ce)12Si6B2O27F14 Approved IMA 1980
NAME ORIGIN: Named for the locality. LOCALITY: Golden Horn Batholith, near Washington Pass, Okanongan County, Washington.
Okayamalite Say Okayamalite  View Okayamalite Image  Ca2B2SiO7 Approved IMA 1998 (Dana # Added)
NAME ORIGIN: Named after it's locality. LOCALITY: The Fuka mine, Bicchu-cho, Okayama Prefecture, Japan.
Okenite Say Okenite  View Okenite Image  Ca3[Si6O15]·6(H2O) Valid Species (Pre-IMA) 1828
NAME ORIGIN: Named for Lorenz Oken (1779-1851), German natural historian, Munich Germany.
Okhotskite-(Mg) Say Okhotskite-(Mg) Ca3(Mg,Mn++)(Mn+++,Al,Fe+++)(SiO4)(Si2O7)(OH)2·(H2O) Not Approved IMA 1987
NAME ORIGIN: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located. LOCALITY:
Okhotskite-(Mn++) Say Okhotskite-(Mn++) Ca2(Mn++,Mg)(Mn+++,Al,Fe+++)Si3O10(OH)4 Approved IMA 1987
NAME ORIGIN: Named in 1987 by Togari and Akasaka for the Sea of Okhotsk, along which the mine is located. LOCALITY: From the Kokuriki mine, at Hiyoshi, about 20 km north of Kitami City, Hikkaido, Japan.
Oldhamite Say Oldhamite  View Oldhamite Image  (Ca,Mg,Fe)S Valid Species (Pre-IMA) 1862
NAME ORIGIN: Named for Thomas Oldham (1816-1878), Director of the Indian Geologial Survey (185o-1876).
Olekminskite Say Olekminskite Sr(Sr,Ca,Ba)(CO3)2 Approved IMA 1991
NAME ORIGIN: Named for Olekminsk, Russia, administrative center for the district in which the Kedrovyi massif is located. LOCALITY: Kedrovyi massif, five km southeast of the Murun massif, Aldan Shield, Sakha, Russia.
Olenite - See Olenite
REMARKS: (61.3.1.7)
Olenite Say Olenite  View Olenite Image  NaAl3Al6(BO3)3(Si6O18)(O,OH)4 Approved IMA 1986 (Dana # Changed)
NAME ORIGIN: Named for the locality. LOCALITY: Decembrist pegmatite field, Olenik River Basin, Russia.
Olgite Say Olgite  View Olgite Image  Na(Sr,Ba)PO4 Discredited IMA 2008 - Approved IMA 1980
NAME ORIGIN: Named for Olga Anisimovne-Vorobiova (1902-1974), Russian mineralogist.
Olgite - See Bario-olgite
REMARKS: Ba bearing
Olgite I - See Olgite
Olgite I - See Bario-olgite
Oligoclase Say Oligoclase  View Oligoclase Images Gallery View Oligoclase Form  (Na,Ca)(Si,Al)4O8 Valid Species (Pre-IMA) 1826
NAME ORIGIN: From the Greek, oligos and kasein, "little cleavage."
Olivenite Say Olivenite  View Olivenite Image View Olivenite Form  Cu2AsO4(OH) Valid Species (Pre-IMA) 1824
NAME ORIGIN: From the German olivernerz, literally "olive" ore, in allusion to its typical color.
Olivine Say Olivine  View Olivine Image  (Mg,Fe)2SiO4 Not Approved IMA
NAME ORIGIN: Named after the green color.
Olivine - See Forsterite
Olkhonskite Say Olkhonskite (Cr+++,V+++)2Ti3O9 Approved IMA 1994
NAME ORIGIN: Named for the locality. LOCALITY: On the western shore of Lake Baikal, 4.5 km south of the Olkhon Island, Russia.
Olmiite View Olmiite Image  CaMn[SiO3(OH)](OH) Approved IMA 2006 (Dana # Added)
NAME ORIGIN: Named for Filippo Olmi, mineralogist at Centre di Studio per la Minerogenesi ela Geochimica Applicata, Florence, Italy
Olmsteadite Say Olmsteadite  View Olmsteadite Image   KFe++2(Nb,Ta)(PO4)2O2·2(H2O) Approved IMA 1976
NAME ORIGIN: Named for Milo Olmstead, micromount mineral collector, Rapid City, South Dakota, USA.
Olsacherite Say Olsacherite  View Olsacherite Image View Olsacherite Form Pb2(SeO4)(SO4) Approved IMA 1969
NAME ORIGIN: Named for Juan A. Olsacher (1903-1964), Argentine mineralogist, University of Cordoba.
Olshanskyite Say Olshanskyite  View Olshanskyite Image  Ca2[B3O3(OH)6]OH·3(H2O) Approved IMA 1969
NAME ORIGIN: Named for Yakov I. Olshansky (1912-1958), Russian geochemist.
Olympite Say Olympite   LiNa5(PO4)2 Approved IMA 1980
NAME ORIGIN: Named for the 1980 Summer Olympic Games, in Moscow, USSR.
Omeiite Say Omeiite   (Os,Ru)As2 Approved IMA 1978
NAME ORIGIN: Named for the locality. LOCALITY: Danba, Omeishan Mt, Sichuan (Szechuan), China,
Ominelite View Ominelite Image  (Fe++,Mg)Al3BSiO9 Approved IMA 2002 (Dana # Added)
NAME ORIGIN: Named after the locality. LOCALITY: Omine Mountains near the misen River at Tenkawa, Yoshio, Nara Prefecture, Japan.
Omongwaite   Na2Ca5(SO4)6·3H2O Approved IMA 2005 (Dana # Added)
NAME ORIGIN: Named for the locality LOCALITY: Omongwa (salt) pan, near Aminuis, 140 km SSE of Gobabis, southwestern Kalahari, Namibia.
Omphacite Say Omphacite  View Omphacite Image  (Ca,Na)(Mg,Fe++,Al)Si2O6 Valid Species (Pre-IMA) 1815
NAME ORIGIN: From the Greek for "unripe grapes", in allusion to its green color.
Oneillite View Oneillite Image  Na15Ca3Mn3Fe++3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 Approved IMA 1998 (Dana # Added)
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 University, Montreal, Canada.
Onofrite(Se) - See Metacinnabar
Onoratoite Say Onoratoite  View Onoratoite Image  Sb8O11Cl2 Approved IMA 1968
NAME ORIGIN: Named for Ettore Onorato (1899-1971), Italian mineralogist, University of Rome, Italy.
Oosterboschite Say Oosterboschite  View Oosterboschite Image (Pd,Cu)7Se3 Approved IMA 1970
NAME ORIGIN: Named for M. R. Oosterbosch, (1908-), Belgian mining engineer.
Opal Say Opal  View Opal Image SiO2·n(H2O) Valid Species (Pre-IMA) Prehistoric
NAME ORIGIN: From the Old Indian upala - "precious stone."
Orange bornite - See Renierite
Orangite - See Thorite
Orcelite Say Orcelite  View Orcelite Image  Ni5-xAs2 (x=0.23) Approved IMA 1959
NAME ORIGIN: Named for Jean Orcel (1896-1978), French mineralogist.
Ordonezite Say Ordonezite  View Ordonezite Image  ZnSb2O6 Valid Species (Pre-IMA) 1955
NAME ORIGIN: Named for Ezequiel Ordonez (1867-1950), Mexican geologist.
Orebroite-III Say Orebroite-III Mn++6(Fe+++,Sb+++++)2Si2(O,OH)14 Approved IMA 1986
NAME ORIGIN: Named for the locality. LOCALITY: Sjogruvan, Grythyttan, Orebro, Sweden.
Orebroite-VIII Say Orebroite-VIII Mn++3(Sb+++++,Fe+++)SiO4(O,OH)3 Approved IMA 1986
NAME ORIGIN: Named for the locality. LOCALITY: At the Sjo mine, near Grythyttan, Orebro, Sweden.
Oregonite Say Oregonite  View Oregonite Image Ni2FeAs2 Approved IMA 1959
NAME ORIGIN: Named for the state of Oregon, USA.
Organovaite-Mn View Organovaite-Mn Image  K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Approved IMA 2002 (Dana # Added)
NAME ORIGIN: Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Mn end-member.
Organovaite-Zn View Organovaite-Zn Image  K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Approved IMA 2002 (Dana # Added)
NAME ORIGIN: Named for Natalia Ivanovna Organova (1929-), Russian crystallographer and the Zn end-member.
Orickite Say Orickite  View Orickite Image CuFeS2·(H2O) Approved IMA 1983
NAME ORIGIN: Named for the locality. LOCALITY: Coyote Peak diatreme, 16 miles SW of Orick, Santa Cruz Co., California.
Orientite Say Orientite  View Orientite Image  Ca2Mn++Mn+++2Si3O10(OH)4 Valid Species (Pre-IMA) 1921
NAME ORIGIN: Named after its locality. LOCALITY: Oriente Province, Cuba.
Orlandiite View Orlandiite Image  Pb3(Cl,OH)4(SeO3)·(H2O) Approved IMA 1998 (Dana # Added)
NAME ORIGIN: Named for mineralogist Paolo Orlandi (1946-) of the University of Pisa, Italy.
Orlovite  KLi2TiSi4O11F Proposed IMA 2009
NAME ORIGIN: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Orlymanite Say Orlymanite  View Orlymanite Image Ca4Mn++3Si8O20(OH)6·2(H2O) Approved IMA 1990
NAME ORIGIN: Named for Orlando P. Lyman (1903-1986), founder of Lyman House Memorial Museum, Hilo, Hawaii.
Oro - See Gold
Orpheite Say Orpheite  View Orpheite Image PbAl3(PO4,SO4)2(OH)6 (?) Approved IMA 1971
NAME ORIGIN: Named for Orpheus, mythical singer in the Rhodopes Mountains.
Orpiment Say Orpiment  View Orpiment Image View Orpiment Form  As2S3 Valid Species (Pre-IMA) 1747
NAME ORIGIN: From the Latin, auripigmentum, in allusion to the vivid golden hue.
Orschallite Say Orschallite   Ca3(SO3)2SO4·12(H2O) Approved IMA 1993
NAME ORIGIN: Named for P. Orschall, Cologne, Germany, who discovered the mineral.
Orthite - See Allanite-(Ce)
Orthite - See Allanite-(Y)
Orthoantigorite - See Lizardite
Orthobrannerite - See Brannerite
Orthobrannerite Say Orthobrannerite   U++++U++++++Ti4O12(OH)2 Approved IMA 1978
NAME ORIGIN: Named as an ORTHOrhombic dimorph of brannerite.
Orthochamosite Say Orthochamosite  View Orthochamosite Image (Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8 Valid Species (Pre-IMA) 1957 (Dana # Added)
NAME ORIGIN: Named as the orthorhombic analogue of chamosite.
Orthochevkinite  (Ce,La,Ca,Na,Th)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22 Not Approved IMA 1920
NAME ORIGIN: Named as a possible orthorhombic form of chevkinite.
Orthochrysotile Say Orthochrysotile  View Orthochrysotile Image Mg3Si2O5(OH)4 Discredited IMA 2006 - Valid Species (Pre-IMA) 1951
NAME ORIGIN: From the orthorhombic crystal symmetry and Greek chrysos - "gold" and tilos - "fiber."
Orthochrysotile - See Chrysotile
Orthoclase Say Orthoclase  View Orthoclase Images Gallery View Orthoclase Form   KAlSi3O8 Valid Species (Pre-IMA) 1823
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
Orthoericssonite Say Orthoericssonite  View Orthoericssonite Image  BaMn2(Fe+++O)Si2O7(OH) Approved IMA 1971
NAME ORIGIN: Named for its ORTHOrhombic crystallization and relation to ericssonite.
Orthoferrosilite - See Ferrosilite
Orthojoaquinite-(Ce) Say Orthojoaquinite-(Ce)   NaFe++Ba2Ce2Ti2[Si4O12]2 O2(OH)·(H2O) Approved IMA 1982
NAME ORIGIN: Named after its orthorhombic crystal structure and the relationship to joaquinite (named for Joaquin Ridge, Diablo Range, California, USA).
Orthojoaquinite-(La) Say Orthojoaquinite-(La)   Ba2Na(La,Ce)2Fe++Ti2Si8O26(OH,O,F)·H2O Approved IMA 2000 (Dana # Added)
NAME ORIGIN: Named as the La analog of orthojoaquinite.
Orthominasragrite View Orthominasragrite Image  VO(SO4)·5(H2O) Approved IMA 2000 (Dana # Added)
NAME ORIGIN: Named for the polymorphic relationship to minasragrite.
Orthopinakiolite Say Orthopinakiolite   (Mg,Mn++)2Mn+++BO5 Approved IMA 1960
NAME ORIGIN: Named as an ORTHOrhombic mineral related to pinakiolite.
Orthose - See Orthoclase
Orthoserpierite Say Orthoserpierite  View Orthoserpierite Image Ca(Cu,Zn)4(SO4)2(OH)6·3(H2O) Approved IMA 1985
NAME ORIGIN: Named for its stuctural rellationship to serpierite.
Orthowalpurgite Say Orthowalpurgite  View Orthowalpurgite Image View Orthowalpurgite Form   (UO2)Bi4O4(AsO4)2·2(H2O) Approved IMA 1995
NAME ORIGIN: It is an orthorhombic polymorph of walpurgite.
Osakaite Zn4SO4(OH)6·5H2O Approved IMA 2006 (Dana # Added)
NAME ORIGIN: Named after the locality. LOCALITY: Hirao mine, Minoo (Minoh) City, Osaka Prefecture, Japan
Osarizawaite Say Osarizawaite  View Osarizawaite Image PbCuAl2(SO4)2(OH)6 Approved IMA 1961
NAME ORIGIN: Named for the locality. LOCALITY: Osarizawa mine, Akita Prefecture, Japan.
Osarsite Say Osarsite (Os,Ru)AsS Approved IMA 1972
NAME ORIGIN: Named after it's chemical composition of osmium and arsenic.
Osbornite Say Osbornite  View Osbornite Image  TiN Valid Species (Pre-IMA) 1870
NAME ORIGIN: For George Osborn, who sent to London the meteorite in which the species was found.
Osmiridium - See Iridium
Osmium Say Osmium  View Osmium Image  (Os,Ir) Valid Species (Pre-IMA) 1804
NAME ORIGIN: Named for the principle element in the composition.
Osumilite - See Osumilite-(Fe)
Osumilite-(Fe) Say Osumilite-(Fe)  View Osumilite-(Fe) Image  (K,Na)(Fe++,Mg)2(Al,Fe+++)3(Si,Al)12O30 Valid Species (Pre-IMA) 1953
NAME ORIGIN: Named for the locality. LOCALITY: Historic province of Osumi in Sakkabira, Kyushu, Japan.
O Mineral Pages: [1] [2]