Mineral Museum of Mineral Species Beginning with O

Orthoclase var. Adularia from Grosstal, Kanton Uri, Switzerland

Orthoclase var. Adularia from Val Cristallina, Switzerland

Orthoclase var. Adularia from Maderanertal, Kanton Uri, Switzerland

Orthoclase var. Adularia from Filtzlithal, Kanton Uri, Switzerland

Orthoclase var. Adularia from Maderanertal, Kanton Uri, Switzerland

Orthoclase var. Adularia from Puiva Deposit, Tyumenskaya Oblast', Sub-Polar Ural Mountains, Russia

Orthoclase var. Adularia from Val Guiv, Kanton Uri, Switzerland

Orthoclase var. Adularia from Switzerland

Orthoclase var. Adularia from Val Cristallina, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia from Guanajuato, Mexico

Orthoclase var. Adularia from Tormiq area, northwest of Skardu, Haramosh Mountains, Baltistan, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia from Cavradischlucht (Cavradi Gorge), Tujetsch, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia from Formazza Valley, Verbano-Cusio-Ossola, Italy

Orthoclase var. Adularia (V-twinned) from Copper Mountain, south of Sulzer, Prince of Wales Island, Alaska

Orthoclase var. Adularia on Datolite with Stilpnomelane from Route 72, Ellis Street Exit, New Britain, Hartford County, Connecticut

Orthoclase var. Adularia on Prehnite and Datolite from Ellis Street Exit, Rt. 72, New Britain, Connecticut

Orthoclase var. Adularia on Quartz from Griessertal, St. Gotthard, Switzerland

Orthoclase var. Adularia on Quartz from Hashupi, Shigar Valley, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia on Smoky Quartz from Maderanertal, Kanton Uri, Switzerland

Orthoclase var. Adularia pseudomorph after Childrenite from Linopolis, Minas Gerais, Brazil

Orthoclase var. Adularia pseudomorphs after Heulandite or Glauberite from Wester Cochno, West Dunbartonshire, Scotland

Orthoclase var. Adularia pseudomorphs after Heulandite or Glauberite from Wester Cochno, West Dunbartonshire, Scotland

Orthoclase var. Adularia twinned crystals with Chlorite coating from Rot Wichel, Fellital, Kanton Uri, Switzerland

Orthoclase var. Adularia Twins from Grimsel Pass, Haslital, Bern, Switzerland

Orthoclase var. Adularia Twins from Cavradischlucht (Cavradi Gorge), Tujetsch, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia Twins with Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase var. Adularia with Actinolite and Clinozoisite-Epidote from Hashupi, Shigar Valley, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia with Actinolite var. Byssolite and Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase var. Adularia with Albite and Chlorite from Acushnet Quarry, Bristol County, Massachusetts

Orthoclase var. Adularia with Chlorite from Teufelsmühle, Habachtal, Austria

Orthoclase var. Adularia with Chlorite from Val Giuv, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia with Chlorite from Val Cristallina, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia with Chlorite from Grosstal, Kanton Uri, Switzerland

Orthoclase var. Adularia with Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase var. Adularia with Chlorite from Alchuri, Shigar Valley, Skardu District, Baltistan, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia with Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase var. Adularia with Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase var. Adularia with Chlorite from Val Tujetsch (Tavetsch), Grischun (Graubünden), Switzerland

Orthoclase var. Adularia with Chlorite from Lago di Agaro, Val d'Ossola, Piemonte, Italy

Orthoclase var. Adularia with Chlorite and Apatite from Fieschergletscher, Wallis, Switzerland

Orthoclase var. Adularia with Chlorite and Titanite from Kreuziltal, Val Tavetsch, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia with Chlorite coating from Aukopel, Kairnten, Austria

Orthoclase var. Adularia with Chlorite coating from Switzerland

Orthoclase var. Adularia with Chlorite coating from Tilcon Quarry, Acushnet, Bristol County, Massachusetts

Orthoclase var. Adularia with Chlorite coating from Lucmanier (Valle Del Lucomagno), Kanton Tessin, Switzerland

Orthoclase var. Adularia with Chlorite coating from Warren Bros. Quarry, Acushnet, Bristol County, Massachusetts

Orthoclase var. Adularia with Chlorite coating from Val Medel, Grischun, Switzerland

Orthoclase var. Adularia with Chlorite coating from Val Cristallina, Grischun, Switzerland

Orthoclase var. Adularia with Chlorite coating from Piz Starlera, Val Cristallina, Grisons, Switzerland

Orthoclase var. Adularia with Chlorite inclusions from Val Malenco, north of Sondrio, Lombardy, Italy

Orthoclase var. Adularia with Chlorite inclusions from Teufelsmühle, Habachtal, Austria

Orthoclase var. Adularia with Clinochlore from Gerental, Kanton Wallis, Switzerland

Orthoclase var. Adularia with minor Chlorite from Val Nalps, Tujetsch, Grischun (Graubünden), Switzerland

Orthoclase var. Adularia with Smoky Quartz from Alchuri, Shigar Valley, Skardu District, Baltistan, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia with Smoky Quartz from Grimsel Pass, Haslital, Bern, Switzerland

Orthoclase var. Adularia, Goethite pseudomorphs after Pyrite, Andradite Garnet from Copper Mountain, Prince of Wales Island, Alaska

Orthoclase var. Adularia, Quartz, Muscovite from Fieschergletscher, Switzerland

Orthoclase var. Amazonite Carlsbad Twin from Pike's Peak Batholith, El Paso County, Colorado

Orthoclase var. Baveno Twin from Washington Mine, Robinson County, North Carolina

Orthoclase var. Baveno-law twin with Quartz from Varese, Lombardy, Italy

Orthoclase var. Baveno-Twin with Quartz from Lake Maggiore, Baveno, Italy (Type Locality for Baveno-Twins)

Orthoclase var. Carlsbad Twin from Climax District, Lake County, Colorado

Orthoclase var. Carlsbad Twin from Goodspring, Clark County, Nevada

Orthoclase var. Carlsbad Twin from Pike's Peak Batholith, El Paso County, Colorado

Orthoclase var. Carlsbad Twin from Goodspring, Clark County, Nevada

Orthoclase var. Carlsbad Twin from Gunheath Pit, St. Austell District, Cornwall, England

Orthoclase var. Carlsbad Twin from Goodsprings District, Clark County, Nevada

Orthoclase var. Carlsbad Twin from White Eagle Mine, Willow Creek Camp, Saline Valley, Inyo County, California

Orthoclase var. Carlsbad Twins from Ray, Mineral Creek District, Pinal County, Arizona

Orthoclase var. Carlsbad-twin from Goodsprings District, Clark County, Nevada

Orthoclase var. Carlsbad-twins from Summit County, Colorado

Orthoclase var. Loxoclase from Bergers, (Canada West), Canada

Orthoclase var. Manebach Twin with Smoky Quartz from Tanokamiyama, Omi, Shiga, Japan

Orthoclase var. Moonstone with Actinolite from Southbridge, Worcester County, Massachusetts

Orthoclase var. Sanidine from Wehr Eifel, Westphalia, Germany

Orthoclase var. Sunstone from Scrub Oaks Mine, Mine Hill, Dover, Morris County, New Jersey

Orthoclase var. Valencianite from La Valencia Mine, Guanajuato, Mexico

Orthoclase var. Valencianite from Valenciana Mine, Guanajuato, Mexico

Orthoclase var. Valencianite Adularia from La Valenciana Mine, Guanajuato, Mexico

Orthoclase var. Valencianite with Calcite var. Argentine from La Valencia Mine, Guanajuato, Mexico

Orthoclase with Hyalite Opal from Tawara, Gifu pref., Japan

Orthoclase with Hyalite Opal from Tawara, Gifu Prefecture, Honshu Island, Japan

Orthoclase with Muscovite from Minas Gerais, Brazil

Orthoclase with Quartz from Holmistrand, Norway

Orthoclase with Rutile inclusions from Switzerland

Orthoclase with Smoky Quartz from Mokrusha Mine, Alabashka pegmatite field, Murzinka region, Middle Urals, Russia

Orthoclase, Carlsbad-twin from Pegmatite near Chuquicamata, Antofagasta, Chile

Orthoclase, Quartz, Muscovite from Baveno, Novara, Italy

Orthoclase, Schorl Tourmaline, Almandine, Quartz from Greenfield, Saratoga County, New York

Orthoclase, Smoky Quartz, Lepidolite, Cookeite, Elbaite from Grotta d'Oggi, Isola d'Elba, Italy (Type Locality for Elbaite)

Orthoclase-Microcline from St. Lawrence County, New York

Osarizawaite from Osarizawa Mine, Akita Prefecture, Japan (Type Locality for Osarizawaite)

Osarizawaite from Osarizawa Mine, Hanawa-machi Kazuno-gun, Akita Pref., Honshu Island, Japan (Type Locality for Osarizawaite)

Osarizawaite with Cerussite from Silver Hill Mine, Pima County, Arizona

Osmium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Iridosmine from Nevyansk, Yekaterinburg, Ural Mountains, Sverdlovsk Oblast', Russia

Osmium Var. Iridosmine from California

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from Newjansk, Yekaterinburg Oblast' (Sverdlovsk), Middle Ural Mountains, Russia

Osmium var. Osmiridium from (Newjansk, Ekaterinberg), Ural Mountains, Russia

Osumilite and Phlogopite (micromount) from North Sister Mountain, Lane County, Oregon

Osumilite on Tridymite from Mount Arci, Marrubiu, Oristano Province, Sardinia, Italy

Osumilite on Tridymite from Obsidian Cliffs, North Sister Mountain, Lane County, Oregon

Otavite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Otavite)

Otavite inclusions in Smithsonite from Monte Cristo Mine, Rush Creek District, Marion County, Arkansas

Otavite, Mimetite, Cerussite, Aragonite var. Tarnowitzite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Otavite)

Ottrelite from southern Stavelot Massif, Ottré, Vielsalm, Belgium (Type Locality for Ottrelite)

Ourayite from Pitiquito, Sonora, Mexico

Ovamboite in Germanite-Renierite matrix from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Ovamboite and Germanite)

Oxalic Acid Crystals (Synthetic) from Man-made

Oxalic Acid Crystals (Synthetic) from Man-made

Oxykinoshitalite (IMA 2004-013) from Fernando de Noronha Island, 326 km northeast of Cabo de Sao Roque, Pernambuco, Brazil (Type Locality for Oxykinoshitalite)

Oyelite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Oyelite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Oyster Shells from midden probably from the Black Horse Tavern, Manhattan Island, near McGowan's Pass, New York City, New York County, New York

Ozokerite (mixture of hydrocarbons) from Spanish Fork Canyon, Utah County, Utah