a Minerals

Malachite, Pyromorphite, Cerussite from Brown's Prospect, Rum Jungle, 61 km south of Darwin, Northern Territory, Australia

Malachite, Pyromorphite, Cerussite from Brown's Prospect, Rum Jungle, 61 km south of Darwin, Northern Territory, Australia

Malachite, Pyromorphite, Cerussite from Brown's Prospect, Rum Jungle, 61 km south of Darwin, Northern Territory, Australia

Malachite, Pyromorphite, Cerussite from Brown's Prospect, Rum Jungle, 61 km south of Darwin, Northern Territory, Australia

Malachite, Quartz, Goethite from Cheshire Barite Mine, Jinny Hill Road, Cheshire, New Haven County, Connecticut

Malachite, Smithsonite and Cobalt-rich Dolomite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Malayaite from Meldon, Devonshire, England

Mangan-neptunite from Mont Saint-Hilaire, Québec, Canada

Manganaxinite from Genessee Valley, Plumas County, California

Manganbabingtonite from Iron Cap Mine, Graham County, Arizona

Manganese Nodule from East Pacific Rise, west of Central America, Pacific Ocean

Manganese Oxide Dendrites in Quartz var. Chalcedony (Dendritic Agate) from Chihuahua, Mexico

Manganese-oxide Nodule from Blake Plateau, east of Georgia coast, Atlantic Ocean

Manganhumite, Zincite, Franklinite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Zincite and Franklinite)

Manganilvaite (IMA 2002-016) on Johannsenite from Osikovo Mine, Madan District, Rhodope Mountains, Bulgaria (Type Locality for Manganilvaite)

Manganite from Ilfeld, Harz Mountains, Germany (Type Locality for Manganite)

Manganite from Ilfeld, Harz Mountains, Germany (Type Locality for Manganite)

Manganite from Ilfeld, Germany

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Nova Scotia, Canada

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Lake Valley District, Sierra County, New Mexico

Manganite from Ilfeld, Nordhausen, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite from (Lucy Mine), Negaunee District, Marquette County, Michigan

Manganite from Ironwood, Gogebic Range, Gogebic County, Michigan

Manganite from Ilfeld, Nordhausen, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Ilfeld, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Ilfeld, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite from Ilfeld, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite from Montreal Mine, Gogebic Iron Range, Iron County, Wisconsin

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Palmetto District, Patagonia Mountains, Santa Cruz County, Arizona

Manganite from Caland Mine, Atikokan, Ontario, Canada

Manganite from Taouz, Errachidia, Drâa-Tafilalet, Morocco

Manganite (twinned crystals) from Ilfeld, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite and Barite from Ilfeld, Thuringia, Germany (Type Locality for Manganite)

Manganite and Rhodochrosite from Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Manganite on Barite from Bölet, Undenäs, Karlsborg, Västerg, Sweden

Manganite on Hematite from Negaunee Iron District, Marquette County, Michigan

Manganite with Barite from Ilfeld, Nordhausen, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite with Barite from Whale Cove, Nova Scotia, Canada

Manganite with Barite and Quartz from Ilfeld, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite with minor Barite from Ilfeld, Nordhausen, Harz Mountains, Thuringia, Germany (Type Locality for Manganite)

Manganite with Quartz from Caland Mine, Atikokan, Ontario, Canada

Manganite with Quartz coating from Hotazel Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Manganite with Quartz coating from Imini, Amerzgane, Ouarzazate, Drâa-Tafilalet, Morocco

Manganocalcite from Pachapaqui Mine, Bolognesi Province, Ancash Department, Peru

Manganocolumbite from Steinkopf, Northern Cape Province, South Africa

Manganocolumbite from Dunton Quarry, Plumbago Mountain, Hall's Ridge, Newry, Oxford County, Maine

Manganocummingtonite var. Tirodite in tremolite from International Talc Co. Mine, Talcville, St. Lawrence County, New York

Manganocummingtonite with Rhodonite from Morro da Mina, Conselheiro Lafaite, Belo Horizonte, Minas Gerais, Brazil

Manganolotharmeyerite (IMA 2001-026) from Starlera Mine, Starlera, Val Ferrera, Grischun (Graubünden), Switzerland (Type Locality for Manganolotharmeyerite)

Manganoneptunite with Aegirine from Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada

Manganosite with Jacobsite from Franklin Mining District, Sussex County, New Jersey

Manganosite, Zincite, Franklinite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Zincite and Franklinite)

Manganosite, Zincite, Franklinite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Zincite and Franklinite)

Manganosite, Zincite, Franklinite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Zincite and Franklinite)

Mansfieldite from Pilbara Region, Western Australia, Australia

Mansfieldite from Hobart Butte, Black Butte District, Lane County, Oregon (Type Locality for Mansfieldite)

Mansfieldite from Mine du Cap Garonne, Le Pradet, Provence-Alpes-Côte d'Azur, France

Mara Mamba Tiger Eye (Quartz pseudomorphous after Riebeckite) from Hamersley Ranges, Ashburton, Pilbara, Western Australia, Australia

Marcasite from Starksville, Mississippi

Marcasite from Rensselaer Quarry, Pleasant Ridge, 6 km east of Rensselaer, Jasper County, Indiana

Marcasite from Shullsburg District, Lafayette County, Wisconsin

Marcasite from Shullsburg District, Lafayette County, Wisconsin

Marcasite from Sokolov, Bohemia, Czech Republic

Marcasite from Ives Quarry, Racine, Wisconsin

Marcasite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite from Rensselaer Quarry, Pleasant Ridge, 6 km east of Rensselaer, Jasper County, Indiana

Marcasite from Rensselaer Quarry, Pleasant Ridge, 6 km east of Rensselaer, Jasper County, Indiana

Marcasite from Eagle Picher Mine, Shullsburg District, Lafayette County, Wisconsin

Marcasite from Rome Street clay pits, Sayreville, Middlesex County, New Jersey

Marcasite from Rome Street clay pits, Sayreville, Middlesex County, New Jersey

Marcasite from Galena, Cherokee County, Kansas

Marcasite from Komorany, Ústí, Bohemia, Czech Republic

Marcasite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite from Komorany, Ústí, Bohemia, Czech Republic

Marcasite from Vintirov, near Sokolov, Bohemia, Czech Republic

Marcasite from San Antonio Mine, Santa Eulalia District, Aquiles Serdán, Chihuahua, Mexico

Marcasite from Misburg, Hannover, Niedersachsen, Germany

Marcasite from Shullsburg District, Lafayette County, Wisconsin

Marcasite from Svatava, near Sokolova, Karlovy Vary, Czech Republic

Marcasite from Magmont Mine, Bixby, Iron County, Missouri

Marcasite from Misburg, Hannover, Niedersachsen, Germany

Marcasite from Komorany, Ústí, Bohemia, Czech Republic

Marcasite from Mineral Point District, Iowa County, Wisconsin

Marcasite from Mineral Point District, Iowa County, Wisconsin

Marcasite from Folkestone, Kent, England

Marcasite and Dolomite from Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite and Pyrite from Lutz Quarry, Oshkosh, Winnebago County, Wisconsin

Marcasite and Pyrite on Sphalerite from Mid-Continent Mine, Treece, Cherokee County, Kansas

Marcasite and Sphalerite on Galena from Mid-Continent Mine, Picher, Ottawa County, Oklahoma

Marcasite in Dolomite from Frizington, West Cumberland Iron Mining District, Cumbria, England

Marcasite in Gypsum var. Selenite from Kanopolis Lake Dam, Ellsworth County, Kansas

Marcasite in limestone from Westfalen, Germany

Marcasite in Quartz var. Agate from Nipomo, San Luis Obispo County, California

Marcasite intersecting stalactitic formations from Linwood Mine, Buffalo, Scott County, Iowa

Marcasite on Calcite from Shullsburg District, Lafayette County, Wisconsin

Marcasite on Calcite from Fogle Quarry, Ottawa, Franklin County, Kansas

Marcasite on Calcite from Brushy Creek Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite on Calcite from Broken Hill, North Mine, 200' Level, New South Wales, Australia

Marcasite on Calcite from Brushy Creek Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite on Calcite in fossil from Fogle Quarry, Ottawa, Franklin County, Kansas

Marcasite on Dolomite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite on Galena from Mid-Continent Mine, Picher, Oklahoma

Marcasite on Galena from Baxter Springs, Kansas

Marcasite on Galena from Magmont Mine, Bixby, Iron County, Missouri

Marcasite on Galena from Buick Mine, Bixby, Viburnum Trend, Iron County, Missouri

Marcasite on Galena from Mid-Continent Mine, Picher, Ottawa County, Oklahoma

Marcasite on Galena from Picher, Ottawa County, Oklahoma

Marcasite on Galena from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite on Galena with Anglesite coating from Viburnum Trend, Reynolds County, Missouri

Marcasite on Sphalerite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite on Sphalerite from Cherokee County, Kansas

Marcasite on Sphalerite from Blackstone Mine, Shullsburg District, Lafayette County, Wisconsin

Marcasite over Dolomite from (Pomorzany Mine), (Olkusz District), (Poland)

Marcasite pseudomorphs after Anhydrite with Galena and Calcite from Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite pseudomorphs after Calcite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Marcasite pseudomorphs after Pyrrhotite from Herja Mine (Kisbanya), Maramures, Romania

Marcasite Stalactite with Galena from Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite var. Speerkies from Komorany, Bilina, Bohemia, Czech Republic

Marcasite with Barite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Marcasite with Calcite from Blackstone Mine, Shullsburg District, Lafayette County, Wisconsin

Marcasite with Calcite from Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri

Marcasite with Calcite from Bellevue Quarry, Eaton County, Michigan

Marcasite with Calcite from Mina de Reocín, Cantabria, Spain

Marcasite with Dolomite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Marcasite with Quartz overgrowth from attributed to Viburnum Trend, Reynolds County, Missouri

Marcasite with Selenite from Kanopolis Lake Dam, Kanopolis, Kansas

Marecottite with Rabejacite from Mine de La Creusaz, near Les Marecottes, Wallis, Switzerland (Type Locality for Marecottite)

Margaritasite from Margaritas Deposit, Penas Blanca District, Chihuahua, Mexico

Margaritasite from Margaritas Deposit, Penas Blanca District, Chihuahua, Mexico

Margarite from Chester Emery Mines, Hampton County, Massachusetts

Margarite from Chester Emery Mines, Hampton County, Massachusetts

Margarite from Chester Emery Mines, Hampton County, Massachusetts

Margarite from Chester Emery Mines, Hampton County, Massachusetts

Margarite from Naxos, Greece

Margarite from Chester Emery Mines, Hampden County, Massachusetts

Margarite from Unionville Corundum Mine, Corundum Hill, Chester County, Pennsylvania

Margarite from Chester Emery Mines, Hampton County, Massachusetts

Margarite from Chester Emery Mines, Hampton County, Massachusetts