a Minerals

Neptunite in Natrolite from Benitoite Gem Mine, New Idria District, San Benito County, California

Neptunite in Natrolite from Benitoite Gem Mine, New Idria District, San Benito County, California

Neptunite on Natrolite from Benitoite Gem Mine, San Benito County, California

Neptunite on Natrolite from Benitoite Gem Mine, San Benito County, California

Neptunite on Natrolite from Dallas Mine, San Benito County, California

Neptunite on Natrolite from Dallas Mine, San Benito County, California

Neptunite on Natrolite from Benitoite Gem Mine, New Idria District, San Benito County, California

Neptunite on Natrolite from Benitoite Gem Mine, New Idria District, San Benito County, California

Neptunite on Natrolite from New Idria District, San Benito County, California

Neptunite with Benitoite and Natrolite from Benitoite Gem Mine, San Benito County, California (Type Locality for Benitoite)

Neptunite with Benitoite and Natrolite from Benitoite Gem Mine, San Benito County, California (Type Locality for Benitoite)

Neptunite, Joaquinite-(Ce), Crossite on Natrolite from Benitoite Gem Mine, New Idria District, San Benito County, California (Type Locality for Joaquinite-(Ce))

Neptunite, Joaquinite-(Ce), Natrolite from Benitoite Gem Mine, San Benito County, California (Type Locality for Joaquinite-(Ce))

New Mineral (= Magnesium-free analog of O'Danielite) on Schneiderhöhnite from Tsumeb Mine, 45 Level, 3rd Oxide Zone, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Schneiderhöhnite)

Newberyite with Hannayite from Mount Widderin lava caves, Skipton, Victoria, Australia (Type Locality for Newberyite and Hannayite)

Nickel (native) from Dronino Meteorite, Ryazanskaya, Russia

Nickel (native) from Dronino Meteorite, Ryazanskaya, Russia

Nickel-Copper-Platinum Ore from Norilsk Mine, Talnakh Intrusive Complex, Krasnoyarsk Krai, Russia

Nickel-Copper-Platinum Ore from Norilsk Mine, Talnakh Intrusive Complex, Krasnoyarsk Krai, Russia

Nickel-Copper-Platinum Ore from Norilsk Mine, Talnakh Intrusive Complex, Krasnoyarsk Krai, Russia

Nickel-Skutterudite var. Chloanthite from Silver Mine, Cobalt, Middlesex County, Connecticut

Nickelboussingaultite from Noril'sk, Putoran Plateau, Taimyr Peninsula, Siberia, Russia (Type Locality for Nickelboussingaultite)

Nickeline and Calcite from Cobalt District, Ontario, Canada

Nickeline and Cobaltite from Keeley-Frontier Mine, South Lorrain Township, Timiskaming District, Ontario, Canada

Nickeline and Silver in Calcite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Eisleben, Thuringia, Germany

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite from Cobalt District, Ontario, Canada

Nickeline var. Niccolite and Breithauptite from Helen's Eplett Mine, Cobalt District, Ontario, Canada

Nickeline var. Niccolite and Rammelsbergite from Great Slave Lake, Northwest Territories, Canada

Nickeline var. Rothnickelkies from Schneeberg District, Sachsen (Saxony), Germany

Nickeline with Annabergite from Cobalt District, Ontario, Canada

Nickelskutterudite var. Chloanthite on Fluorite from Zinngrube Sauberg, Ehrenfriedersdorf, Erzgebirge, Germany

Nickelskutterudite var. Chloanthite on Fluorite from Zinngrube Sauberg, Ehrenfriedersdorf, Erzgebirge, Germany

Nickelskutterudite with Barite from Niederschlema, Erzgebirge, Sachsen, Germany

Norbergite and Graphite in marble from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Graphite in marble from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Phlogopite, Graphite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Phlogopite, Graphite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Phlogopite, Graphite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Phlogopite, Graphite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Norbergite, Phlogopite, Graphite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Nosean from Niedermendig, Laacher See, Eifel Mountains, Rheinland-Pfalz, Germany (Type Locality for Nosean)

Nosean, Sanidine, Biotite from Niedermendig, Laacher See, Eifel Mountains, Rheinland-Pfalz, Germany (Type Locality for Nosean)

Novácekite on Aragonite from Zacatecas, Mexico

Novacekite on Gypsum from Santa Eulalia District, Aquiles Serdán, Chihuahua, Mexico

Novacekite on Gypsum from Virgen Mine, Aldama, Chihuahua, Mexico

Novacekite on Gypsum from Aldama, Chihuahua, Mexico

Novacekite, Gypsum, Calcite from Las Animas Mine, Aquiles Serdán, Chihuahua, Mexico

Novacekite, Gypsum, Calcite from Las Animas Mine, Aquiles Serdán, Chihuahua, Mexico

Nyerereite and Gregoryite from Oldoinyo Lengai volcano, Maasai Steppe, East Africa Rift Valley, Tanzania (Type Locality for Nyerereite and Gregoryite)

Oboyerite, Jarosite, Rodalquilarite from Grand Central Mine, Tombstone District, Cochise County, Arizona (Type Locality for Oboyerite)

Obradovicite with Jarosite, Quartz from Mina Chuqui, Chuquicamata, Antofagasta, Chile (Type Locality for Obradovicite)

Obradovicite, Jarosite, Wulfenite, Quartz from Mina Chuqui, Chuquicamata, Atacama Desert, Chile (Type Locality for Obradovicite)

Obsidian from Vulcano, Aeolian Islands, Italy

Obsidian var. Apache Tear from Superior District, Pinal County, Arizona

Obsidian var. Apache Tear from Superior, Pinal County, Arizona

Obsidian var. Apache Tear from Superior, Pinal County, Arizona

Obsidian var. Apache Tear from Superior District, Pinal County, Arizona

Obsidian var. Apache Tear from Oregon

Obsidian var. Apache Tears from Superior, Pinal County, Arizona

Obsidian var. Apache Tears from Superior District, Pinal County, Arizona

Obsidian with Cristobalite from Obsidian Hill, near Delta, Millard County, Utah

Obsidian with Cristobalite inclusions (Snowflake Obsidian) from California

Obsidian with Cristobalite inclusions (Snowflake Obsidian) from California

Obsidian with Cristobalite inclusions (Snowflake Obsidian) from California

Obsidian with Cristobalite inclusions (Snowflake Obsidian) from California

Okaite (feldspathoidal ultramafic igneous rock) from Husereau Hill, Oka Complex, Deux-Montagnes, Québec, Canada

Okanoganite-(Y) and Arfvedsonite from Washington Pass, Okanogan County, Washington (Type Locality for Okanoganite-(Y))

Okenite and Gyrolite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite and Gyrolite from Pune District, Maharashtra, India

Okenite and Gyrolite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite and Gyrolite on Quartz from Malad Quarry, Mumbai (Bombay) District, Maharashtra, India

Okenite and Quartz from Malad Quarry, Mumbai (Bombay) District, Maharashtra, India

Okenite in Calcite from Jalna, Maharashtra, India

Okenite on Amethyst Quartz from Mumbai (Bombay) District, Maharashtra, India

Okenite on Laumontite from Pune District, Maharashtra, India

Okenite on Prehnite with Apophyllite from Malad, Maharashtra, India

Okenite on Quartz from Mumbai (Bombay) District, Maharashtra, India

Okenite on Quartz var. Amethyst from Shirdi, Ahmadnagar, Maharashtra, India

Okenite on Quartz with Calcite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite with Gyrolite on Quartz from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite, Apophyllite, Prehnite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite, Apophyllite, Quartz from Mumbai, Maharashtra, India

Okenite, Apophyllite, Quartz, Gyrolite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite, Calcite, Gyrolite from Bombay Quarry, Mumbai (Bombay), Maharastra, India

Okenite, Gyrolite, Laumontite from Pune District, Maharashtra, India

Okenite, Prehnite, Apophyllite from Mumbai District, Maharashtra, India

Oligoclase, Calcite, Quartz from San Luis Potosi, Mexico

Oligoclase, Sphalerite, Pyrite from San Luis Potosi, Mexico

Oligoclase, Sphalerite, Pyrite from San Luis Potosi, Mexico

Olivenite and Cornwallite on Quartz from Bawden's Shaft, Wheal Gorland, St. Day, Cornwall, England (Type Locality for Cornwallite)

Olivenite and Malachite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Olivenite and Malachite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Olivenite and Malachite from Lake Mine (Gunnis Lake Mine?), Cornwall, England

Olivenite and Smithsonite from Hilarion adit, Kamareza Mine, Laurium District, Attika, Greece

Olivenite on Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Olivenite on Quartz from (Centennial Eureka Mine?), (Tintic District?), Utah

Olivenite on Quartz from Wheal Gorland, St. Day District, Cornwall, England

Olivenite var. Leucochalcite from Mine du Cap Garonne, Le Pradet, Provence-Alpes-Côte d'Azur, France

Olivenite with Bayldonite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Olivenite, Duftite, Cuproadamite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Duftite)

Olmiite and Bultfonteinite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite and Bultfonteinite from Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite and Calcite on Mn-oxide from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning Mines, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Hematite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite on Oyelite and Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite with Calcite from N'Chwaning Mines, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite with Calcite and Oyelite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite with minor Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite with Oyelite and Calcite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olmiite-Poldervaartite on Hematite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa (Type Locality for Olmiite)

Olshanskyite from Titovskoe Deposit, Tas-Khayakhtakh Range, Polar Yakutia, Saha, Russia (Type Locality for Olshanskyite)

Onoratoite from Cetine di Cotorniano Mine, Rosia, Siena, Toscana (Tuscany), Italy (Type Locality for Onoratoite)

Onoratoite from Cetine di Cotoriano, near Rosia, Siena, Tuscany, Italy (Type Locality for Onoratoite)

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Coober Pedy, Australia

Opal from Cobber Pedy, Australia

Opal from Andamooka, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia

Opal from Coober Pedy, South Australia, Australia