a Minerals

Moss Opal from Puerto Rico

Mottramite from Mottram Mine, Mottram St. Andrew, Cheshire, England (Type Locality for Mottramite)

Mottramite from Socorro Peak, Socorro, New Mexico

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Otavi, Otavi Mountain Land, Namibia

Mottramite from Total Wreck Mine, Empire Mountains, Pima County, Arizona

Mottramite from Total Wreck Mine, Empire Mountains, Pima County, Arizona

Mottramite from Putnam Wash, San Manuel, Pinal County, Arizona

Mottramite from Mammoth-St. Anthony Mine, Tiger, Mammoth District, Pinal County, Arizona

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Finch Mine (Barking Spider Mine), north of Hayden, Banner District, Gila County, Arizona

Mottramite from Finch Mine (Barking Spider Mine), north of Hayden, Banner District, Gila County, Arizona

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite from Mina Ojuela, Level 35, Mapimi, Durango, Mexico

Mottramite / Descloizite from Summit Mine, Broadwater County, Montana

Mottramite / Descloizite from Summit Mine, Broadwater County, Montana

Mottramite / Descloizite from Summit Mine, Broadwater County, Montana

Mottramite and Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite and Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite and Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite and Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite and Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite in Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite intergrown with Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

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

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

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

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

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

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

Mottramite on Phosphohedyphane, Chrysocolla, Goethite from Cove Vein, Whytes Cleuch, Wanlockhead, Dumfriesshire, Scotland

Mottramite on Wulfenite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite over Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite over Phosphohedyphane on Cerussite from Cove Vein, Whytes Cleuch, Wanlockhead, Dumfriesshire, Scotland

Mottramite pseudomorph after Copper from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorph after Copper from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorph after Copper from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorph after Copper from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorph after Copper from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorph after Wulfenite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorphs after Cerussite from Stevenson-Bennett Mine, Organ Mountains, Doña Ana County, New Mexico

Mottramite pseudomorphs after Wulfenite from Total Wreck Mine, Empire Mountains, Pima County, Arizona

Mottramite pseudomorphs after Wulfenite from Total Wreck Mine, Empire Mountains, Pima County, Arizona

Mottramite pseudomorphs after Wulfenite on Dolomite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite pseudomorphs after Wulfenite over Calcite from Total Wreck Mine, Empire Mountains, Pima County, Arizona

Mottramite var. Cuprodescloizite from Goodsprings District, Clark County, Nevada

Mottramite var. Cuprodescloizite from Goodsprings District, Clark County, Nevada

Mottramite var. Cuprodescloizite from Goodsprings District, Clark County, Nevada

Mottramite var. Psittacinite on Descloizite from Uris Mine, Bobos Area, Otavi-Bergland District, Oshikoto, Namibia

Mottramite with Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Mottramite, Phosphohedyphane, Chrysocolla, Goethite from Cove Vein, Whytes Cleuch, Wanlockhead, Dumfriesshire, Scotland

Mottramite, Wulfenite, Calcite from Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia

Motukoreaite from Motukorea Island, Auckland Bay, North Island, New Zealand (Type Locality for Motukoreaite)

Mountain Cork (assorted amphiboles) from Blythe, Riverside County, California

Muonionalusta Meteorite (fine octahedrite, type IVA Iron) from Kitkiöjärvi, Pajala, Norrbotten, Sweden

Murataite-(Y) from St. Peters Dome, El Paso County, Colorado (Type Locality for Murataite-(Y))

Murdochite and Malachite from Bisbee, Warren District, Cochise County, Arizona

Murdochite on Quartz from Mex-Tex Mine, Hansonburg District, 8.5 km south of Bingham, Socorro County, New Mexico

Murdochite on Quartz from Blanchard Mine, Hansonburg District, 8.5 km south of Bingham, Socorro County, New Mexico

Murdochite with Malachite-Rosasite on Quartz from Bisbee District, Cochise County, Arizona

Murdochite, Malachite, Calcite from Southwest Mine, 5th Level, Bisbee, Warren District, Cochise County, Arizona

Murmanite from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite with Aegirine from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Murmanite with Zorite and Eudialyte from Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Type Locality for Murmanite)

Muscovite (columnar crystals) on Albite var. Cleavelandite from Emmons Quarry, southeastern slope of Uncle Tom Mountain, Greenwood, Oxford County, Maine

Muscovite (columnar crystals) on Albite var. Cleavelandite from Emmons Quarry, southeastern slope of Uncle Tom Mountain, Greenwood, Oxford County, Maine

Muscovite (columnar crystals) on Albite var. Cleavelandite from Emmons Quarry, southeastern slope of Uncle Tom Mountain, Greenwood, Oxford County, Maine

Muscovite (fishtail-twinned crystals) from Minas Gerais, Brazil

Muscovite (Hafnium-rich) from Broken Hill, New South Wales, Australia

Muscovite (Hafnium-rich) from Broken Hill, New South Wales, Australia

Muscovite (large book of thin crystals) from Strickland Quarry, Collins Hill, Portland, Middlesex County, Connecticut

Muscovite (large book of thin crystals) from Strickland Quarry, Collins Hill, Portland, Middlesex County, Connecticut

Muscovite (pocket crystals) with Hyalite Opal from Lord Hill Quarry, Stoneham, Oxford County, Maine

Muscovite (rare red color) from Minas Gerais, Brazil

Muscovite (twinned star-shaped crystals) from Jenipapo District, Itinga, Minas Gerais, Brazil

Muscovite (twinned star-shaped crystals) from Jenipapo District, Itinga, Minas Gerais, Brazil

Muscovite and Quartz with Albite from Minas Gerais, Brazil

Muscovite and Stilbite from Pack Rat Mine, San Diego County, California

Muscovite Mica from Delaware County, Pennsylvania

Muscovite Mica from Cleveland County, North Carolina

Muscovite Mica from Songo Pond Quarry, Albany, Oxford County, Maine

Muscovite Mica from near Shelby, Cleveland County, North Carolina

Muscovite Mica from near Shelby, Cleveland County, North Carolina

Muscovite Mica from Mitchell County, North Carolina

Muscovite Mica from Emmons Quarry, southeastern slope of Uncle Tom Mountain, Last Day pocket, Greenwood, Oxford County, Maine

Muscovite Mica from Ze Pinto Prospect, Conselheiro Peña, Doce valley, Minas Gerais, Brazil

Muscovite Mica from Hiddenite, Alexander County, North Carolina

Muscovite Mica (curved crystals) from San Domingo Wash, 14.7 km east of Wickenburg, Maricopa County, Arizona

Muscovite Mica on Quartz from Strickland Quarry, Collins Hill, Portland, Middlesex County, Connecticut

Muscovite Mica with Schorl Tourmaline from Minas Gerais, Brazil

Muscovite on Albite from Big Quarry, Alstead District, Cheshire County, New Hampshire

Muscovite on Smoky Quartz from Minas Gerais, Brazil

Muscovite over Albite with Fluorapatite from Jenipapo District, Itinga, Minas Gerais, Brazil

Muscovite pseudomorph after Cordierite from Llallagua, Bustillos Province, Potosi Department, Bolivia

Muscovite pseudomorph after Iolite (var. Pinite) from Annaberg, Saxony, Germany

Muscovite pseudomorph after Schorl from Gavilan Hills, west of Perris, Riverside County, California

Muscovite pseudomorph after Spodumene from Virgem de Lapa, Minas Gerais, Brazil

Muscovite pseudomorph after Spodumene (a.k.a. Cymatolite) from Goshen, Hampshire County, Massachusetts

Muscovite pseudomorph after Spodumene (var. Pinite) from Strickland Quarry, Collins Hill, Portland, Middlesex County, Connecticut

Muscovite pseudomorph after Topaz (a.k.a. Gilbertite) from Cornwall, England

Muscovite pseudomorph after Tourmaline from Noyes Mountain, Greenwood, Maine

Muscovite pseudomorph after Tourmaline (Sericite) from Willow Spring Ranch, Oracle, Pinal County, Arizona

Muscovite pseudomorph after Tourmaline (Sericite) from Willow Spring Ranch, Oracle, Pinal County, Arizona

Muscovite pseudomorphs after Andalusite from Champion Mine, 6 km WSW of White Mountain Peak, White Mountains, Mono County, California

Muscovite pseudomorphs after Elbaite Tourmaline from Mount Mica Quarry, Paris, Oxford County, Maine

Muscovite pseudomorphs after Schorl Tourmaline from Noyes Mountain, Greenwood, Oxford County, Maine

Muscovite var. Alurgite from Cajon Pass, San Bernardino County, California

Muscovite var. Ball-Peen Mica from Branchville Quarry, Redding, Fairfield County, Connecticut

Muscovite var. Ball-Peen Mica from Branchville Quarry, Redding, Fairfield County, Connecticut

Muscovite var. Ball-Peen Mica from Branchville Quarry, Redding, Fairfield County, Connecticut

Muscovite var. Ball-Peen Mica from Branchville Quarry, Redding, Fairfield County, Connecticut

Muscovite var. Ball-Peen Mica from Lord Hill Quarry, Stoneham, Oxford County, Maine

Muscovite var. Ball-Peen Mica from Chandler Mine, Raymond, Rockingham County, New Hampshire

Muscovite var. Damourite pseudomorph after Elbaite Tourmaline from (Mount Rubellite) Hebron, Oxford County, Maine

Muscovite var. Fuchsite from Wolf Neck, Freeport, Maine

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from near Rutland, Rutland County, Vermont

Muscovite var. Fuchsite from Wolf Neck, Cumberland County, Maine

Muscovite var. Fuchsite from Wolf Neck, Cumberland County, Maine

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Fuchsite from Minas Gerais, Brazil

Muscovite var. Margarodite from Trumbull Tungsten Mine, Fairfield County, Connecticut

Muscovite var. Mariposite from Josephine Mine, Mariposa County, California (Type Locality for Mariposite)

Muscovite var. Mariposite from Maricopa County, Arizona

Muscovite var. Mariposite from Josephine Mine, Mariposa County, California (Type Locality for Mariposite)

Muscovite var. Mariposite from Mariposa County, California (Type Locality for Mariposite)

Muscovite var. Mariposite from Mariposa County, California (Type Locality for Mariposite)

Muscovite var. Mariposite from Mariposa County, California (Type Locality for Mariposite)

Muscovite var. Red Muscovite from North Bay, Nipissing District, Ontario, Canada

Muscovite var. Rose Muscovite from Harding Mine, 8 km east of Dixon, Taos County, New Mexico