Mineral Museum of Mineral Species Beginning with O

Orpiment from Twin Creeks Mine, Humboldt County, Nevada

Orpiment from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment from Shimen Mine, Hunan Province, China

Orpiment from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment from Getchell Mine, Humboldt County, Nevada

Orpiment from Shimen Mine, Hunan Province, China

Orpiment from Shimen Mine, Hunan Province, China

Orpiment from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment from Twin Creeks Mine, Humboldt County, Nevada

Orpiment from Twin Creeks Mine, Cut 62, Humboldt County, Nevada

Orpiment from Shimen Mine, Hunan, China

Orpiment from Shimen Mine, Hunan, China

Orpiment from El'brusskiy Mine, 35 km NE of Mount Elbrus, Kabardino-Balkarian Republic, Russia

Orpiment from Twin Creeks Mine, Cut 62, Humboldt County, Nevada

Orpiment from El'brusskiy Mine, 35 km NE of Mount Elbrus, Kabardino-Balkarian Republic, Russia

Orpiment from Shimen Mine, Hunan, China

Orpiment from Shimen Mine, Hunan Province, China

Orpiment and Calcite from El'brusskiy Mine, 35 km NE of Mount Elbrus, Kabardino-Balkarian Republic, Russia

Orpiment and Calcite from Shimen Mine, Hunan, China

Orpiment and Calcite from Gold Bar Mine, Antelope District, Eureka County, Nevada

Orpiment and Realgar from White Caps Mine, Manhattan District, Nye County, Nevada

Orpiment and Realgar from White Caps Mine, Manhattan District, Nye County, Nevada

Orpiment and Realgar from White Caps Mine, Manhattan District, Nye County, Nevada

Orpiment in Calcite from Shimen Mine, Hunan, China

Orpiment in Calcite from Shimen Mine, Hunan, China

Orpiment in Calcite with Realgar from Shimen Mine, Hunan, China

Orpiment in Calcite with Realgar from Shimen Mine, Hunan, China

Orpiment on Arsenopyrite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Barite from El'brusskiy Mine, 35 km NE of Mount Elbrus, Kabardino-Balkarian Republic, Russia

Orpiment on Barite from El'brusskiy Mine, 35 km NE of Mount Elbrus, Kabardino-Balkarian Republic, Russia

Orpiment on Hutchinsonite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite with Hutchinsonite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment on Pyrite with Quartz from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Barite from Twin Creek Mine, Humboldt, Nevada

Orpiment with Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Calcite from Shimen Mine, Hunan, China

Orpiment with minor Realgar from Getchell Mine, Humboldt County, Nevada

Orpiment with Realgar from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Realgar from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment with Realgar from Getchell Mine, Humboldt County, Nevada

Orpiment with Realgar from Getchell Mine, Humboldt County, Nevada

Orpiment with Realgar from Getchell Mine, Humboldt County, Nevada

Orpiment with Realgar from Mercur District, Toole County, Utah

Orpiment, Barite, Realgar from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment, Barite, Realgar from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment, Calcite, Realgar from Getchell Mine, Humboldt County, Nevada

Orpiment, Hutchinsonite, Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment, Hutchinsonite, Barite from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment, Pyrite, Quartz from Quiruvilca District, Santiago de Chuco Province, La Libertad Department, Peru

Orpiment, Realgar, Pyrite from Getchell Mine, Humboldt County, Nevada

Orthoclase from Itrongay, Madagascar

Orthoclase from Bustaviejo, Spain

Orthoclase from Ray Mine, Mineral Creek District, Pinal County, Arizona

Orthoclase from Princess Quarry, Bancroft, Ontario, Canada

Orthoclase from Ray Mine, Mineral Creek District, Pinal County, Arizona

Orthoclase from Route 28 road cut, Bancroft, Ontario, Canada

Orthoclase from Kunar, Afghanistan

Orthoclase from Bedford, Westchester County, New York

Orthoclase from Badlands, North Dakota

Orthoclase from Badlands, North Dakota

Orthoclase from Delaware County, Pennsylvania

Orthoclase from Lake George district, Park County, Colorado

Orthoclase from Delaware County, Pennsylvania

Orthoclase from Topsham, Sagadahoc County, Maine

Orthoclase from Beaverdell, Greenwood Mining District, British Columbia, Canada

Orthoclase from Gunheath Pit, St. Austell District, Cornwall, England

Orthoclase from Sakangyi area, west of Mogok, Shan State, Myanmar (Burma)

Orthoclase from Climax District, Lake County, Colorado

Orthoclase (Baveno Twin) from Tahara, Hirukawa, Gifu, Japan

Orthoclase (Baveno- and Manebach-Twinned) from Baveno, Novara, Piemonte, Italy

Orthoclase (Baveno-Law Twinned) with Chlorite from St. Gotthard, Kanton Uri, Switzerland

Orthoclase (Baveno-Law Twinned) with Quartz from Chilas, Diamar District, Gilgit-Baltistan, Pakistan

Orthoclase (Baveno-Law Twins) from Organ District, Doña Ana County, New Mexico

Orthoclase (Carlsbad-Law Twinned) from El Escorial, Madrid, Spain

Orthoclase (gem-grade) from Itrongay, Betroka Department, Tulear Province, Madagascar

Orthoclase (gem-grade) from Itrongay, Betroka Department, Tulear Province, Madagascar

Orthoclase (gem-grade) from Itrongay, Betroka Department, Tulear Province, Madagascar

Orthoclase and Quartz with Chlorite coating from St. Gotthard, Kanton Uri, Switzerland

Orthoclase and Smoky Quartz from Moat Mountain, Hale's Location, Carroll County, New Hampshire

Orthoclase on Microcline (Baveno Law Twin) from Baveno, Verbano-Cusio-Ossola, Piemonte, Italy (Type Locality for Baveno Law of twinned feldspar)

Orthoclase pseudomorph after Leucite from Magnet Cove, Hot Spring County, Arkansas

Orthoclase pseudomorph after Leucite from Kaman District, Kirsehir Province, Turkey

Orthoclase var. Adularia from Floienthal, Switzerland

Orthoclase var. Adularia from St. Gotthard, Switzerland

Orthoclase var. Adularia from Saratal, Sud-Tyrol, Austria

Orthoclase var. Adularia from Salzburg, Austria

Orthoclase var. Adularia from Hanuchal, Gilgit-Baltistan, Pakistan

Orthoclase var. Adularia from Kanton Uri, Switzerland

Orthoclase var. Adularia from Keystone Trap Rock Quarry, Cornog, Chester County, Pennsylvania

Orthoclase var. Adularia from Engstligenalp, Adelboden, Switzerland

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

Orthoclase var. Adularia from St. Gotthard, Reusstal, Uri, Switzerland

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