n Minerals

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

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

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

Marcasite with Selenite from Kanopolis Lake Dam, Kanopolis, Kansas

Margarite in Magnetite from Chester Emery Mines, Hampden County, Massachusetts

Margarosanite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Margarosanite)

Margarosanite on Calcite from Jacobsberg Mine, Nordmark, Varmland, Sweden

Margarosanite, Hancockite, Franklinite, Andradite from Franklin Mining District, Sussex County, New Jersey (Type Locality for Margarosanite, Hancockite, Franklinite)

Marialite (8.42 ct. crystal with 1.13 faceted gemstone) from Mpwapwa, 130 km WNW of Morogoro, Dodoma Region, Tanzania

Marialite var. Wernerite from Laurinkari Mine, Turku Ja Pori, Finland

Marialite var. Wernerite from Lime Crest Quarry (Limecrest), Sussex Mills, 4.5 km northwest of Sparta, Sussex County, New Jersey

Marrite and Jordanite from Lengenbach Quarry, Binntal, Wallis, Switzerland (Type Locality for Marrite and Jordanite)

Mascagnite from Schoeller Mine, Kladno, Central Bohemia, Czech Republic

Mascagnite from Schoeller Mine, Kladno, Central Bohemia, Czech Republic

Mattagamite, Altaite and Tellurantimony on Pyrrhotite from Mattagami Lake Mine, Galinee, near Mattagami, Québec, Canada (Type Locality for Mattagamite and Tellurantimony)

Mawsonite var. Feuermineral in Bornite and Chalcocite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Feuermineral)

Mcgovernite from Sterling Mine, Ogdensburg, Sterling Hill, Sussex County, New Jersey (Type Locality for Mcgovernite)

Mcgovernite from Sterling Mine, Ogdensburg, Sterling Hill, Sussex County, New Jersey (Type Locality for Mcgovernite)

Mcgovernite on Calcite, Willemite, Franklinite from Sterling Mine, Ogdensburg, Franklin District, Sussex County, New Jersey (Type Locality for Mcgovernite)

Mcgovernite, Franklinite, Willemite, Calcite from Sterling Mine, Ogdensburg, Sterling Hill, Sussex County, New Jersey (Type Locality for Mcgovernite and Franklinite)

Mcgovernite, Willemite, Franklinite, Calcite from Sterling Mine, Ogdensburg, Sterling Hill, Sussex County, New Jersey (Type Locality for Mcgovernite and Franklinite)

Mcguinnessite from Red Mountain, Mendocino County, California (Type Locality for Mcguinnessite)

Mcguinnessite and Hydromagnesite from Rockville Quarry, Montgomery County, Maryland

Mcguinnessite with Callaghanite from Gabbs Magnesite-Brucite Mine, Gabbs District, Nye County, Nevada (Type Locality for Callaghanite)

Mcguinnessite with Malachite from Red Mountain District, Mendocino County, California (Type Locality for Mcguinnessite)

Meionite from Kukh-i-Lal, Pamir Mountains, Tajikistan

Meionite from Gooderham, Ontario, Canada

Meionite from Faraday Mine, Bancroft, Ontario, Canada

Meionite from Gooderham, Ontario, Canada

Meionite from Gooderham, Ontario, Canada

Meionite from Gooderham, Ontario, Canada

Meionite from Gooderham, Ontario, Canada

Meionite from Itaguassu, Espírito Santo, Brazil

Meionite from Goodall Farm Quarry, Sanford, York County, Maine

Meionite from Kukh-i-Lal, Pamir Mountains, Tajikistan

Meionite from Kukh-i-Lal, Pamir Mountains, Tajikistan

Meionite from Bolton Lime Quarry, Bolton, Worcester County, Massachusetts

Meionite from Itaguassu, Espírito Santo, Brazil

Meionite from Gooderham, Ontario, Canada

Meionite (Scapolite) from Bolton Lime Quarry, Bolton, Worcester County, Massachusetts

Meionite and Diopside from Berry Ledge, Cornish, York County, Maine

Meionite and Diopside with Titanite from Berry's Ledge, Cornish, York County, Maine

Meionite and Vesuvianite from Goodall Farm Quarry, 600 meter Prospect, Sanford, York County, Maine

Meionite in Quartz from Bolton Lime Quarries, Rattlesnake Hill, Worcester County, Massachusetts

Meionite in Quartz from Bolton Lime Quarries, Rattlesnake Hill, Worcester County, Massachusetts

Meionite in Quartz from Bolton Lime Quarries, Rattlesnake Hill, Worcester County, Massachusetts

Meionite var. Nuttalite from Natural Bridge, Diana Township, Lewis County, New York

Meionite var. Wernerite from Frontinac County, Ontario, Canada

Meionite var. Wernerite from Ontario, Canada

Meionite var. Wernerite from Ross Township, (Ontario?), Canada

Meionite var. Wernerite (fluoresces yellow-orange under UV) from Grenville, Québec, Canada

Meionite with Diopside from Berry's Ledge, Cornish, York County, Maine

Meionite with Titanite from Bolton Lime Quarry, Bolton, Worcester County, Massachusetts

Meionite with Vesuvianite from Somma-Vesuvius Complex, Naples Province, Campania, Italy (Type Locality for Meionite with Vesuvianite)

Meionite, Titanite, Diopside, Phlogopite from Goodall Farm Quarry, 600 meter Prospect, Sanford, York County, Maine

Meionite-Marialite (Scapolite) from Androy, Madagascar

Melanite Garnet from Benitoite locality, San Benito County, California

Melanophlogite from Fortullino, Livorno, Tuscany, Italy

Melanophlogite from Mount Hamilton, Santa Clara County, California

Melanophlogite from Fortullino, Livorno, Tuscany, Italy

Melanophlogite on Celestine with minor Sulfur from Racalmuto, Girgenti, Sicily, Italy

Melanterite from Billingsport, Gloucester County, New Jersey

Melanterite from New Almaden Mine, Santa Teresa Hills, Santa Clara County, California

Melanterite from New Almaden Mine, Santa Teresa Hills, Santa Clara County, California

Melanterite (synthetic) from Man-made

Melanterite var. Pisanite from Placer County, California

Meliphanite from Frediksvärn, Norway (Type Locality for Meliphanite)

Melonite with Fluorite from Cripple Creek District, Teller County, Colorado

Meneghinite from Bottino Mine, near Serravezza, Tuscany, Italy (Type Locality for Meneghinite)

Meneghinite from Kalkar Limestone Quarry, Santa Cruz County, California

Menezesite with Phlogopite and Calcite from Jacupiranga Mine, Cajati, São Paulo, Brazil (Type Locality for Menezesite)

Mercury and Cinnabar from California

Mercury on Cinnabar from Almaden District, Ciudad Real, Castile-La Mancha, Spain

Mercury on Cinnabar from Almadén District, Ciudad Real, Castile-La Mancha, Spain

Mercury on matrix from (Idrija Mine), (Slovenia)

Mercury with Cinnabar from Socrates Mine, Sonoma County, California

Mercury with Cinnabar from Napa County, California

Mercury with Cinnabar from Humboldt County, Nevada

Mercury with Tiemannite, Cinnabar, Pyrite from Castle Rock Springs, 24 km northeast of Healdsburg, Sonoma County, California

Merlinoite from Cava Cupaello, Santa Rufina, Rieti, Lazio, Italy (Type Locality for Merlinoite)

Merwinite from Crestmore Quarry, Crestmore, Riverside County, California (Type Locality for Merwinite)

Merwinite and Plombièrite from Crestmore Quarry, Riverside County, California (Type Locality for Merwinite)

Merwinite and Plombièrite from Crestmore Quarry, Riverside County, California (Type Locality for Merwinite)

Merwinite and Plombièrite from Crestmore Quarry, Riverside County, California (Type Locality for Merwinite)

Merwinite and Plombièrite from Crestmore Quarry, Riverside County, California (Type Locality for Merwinite)

Merwinite in Monticellite-Spurrite from Crestmore Quarry, Riverside County, California (Type Locality for Merwinite)

Mesolite - Natrolite from Wren, Oregon

Mesolite on Analcime from Skookumchuck Dam, Tenino, Thurston County, Washington

Mesolite on Apophyllite from Palabora Open Pit Mine, Phalaborwa Complex, Limpopo Province (formerly Transvaal), South Africa

Mesolite on Apophyllite from Upper New Street Quarry, Paterson, Passaic County, New Jersey

Mesolite on Calcite with Goethite from Paterson, Passaic County, New Jersey

Mesolite on Heulandite from Deshgaon, Khandwa District, Madhya Pradesh, India

Mesolite on Heulandite-Ca from Kannad, Aurangabad District, Maharashtra, India

Mesolite on Prehnite from Upper New Street Quarry, Paterson, Passaic County, New Jersey

Mesolite on Quartz from Wiley Wells, southwest of Blythe, California

Mesolite on Stilbite from Upper New Street Quarry, Paterson, Passaic County, New Jersey

Mesolite on Stilbite from Kannad, Aurangabad, Maharashtra, India

Mesolite on Stilbite from Kannad, Aurangabad, Maharashtra, India