a Minerals

Hydromagnesite from Livermore, California

Hydromagnesite from Red Mountain Distric, Santa Clara County, California

Hydromagnesite from Gabbs District, Nye County, Nevada

Hydromagnesite from Gabbs District, Nye County, Nevada

Hydromagnesite from Gabbs District, Nye County, Nevada

Hydromagnesite from Cedar Hill Quarry, State Line District, Lancaster County, Pennsylvania

Hydromagnesite from Cedar Hill Quarry, State Line District, Lancaster County, Pennsylvania

Hydromagnesite from Crestmore Quarry, Crestmore, Riverside County, California

Hydromagnesite from Spring Street at Medford Road, Staten Island, New York City, Richmond County, New York

Hydromagnesite and Brucite with Aragonite from Castle Point (Stevens Bluff), Hoboken, (west shore of Hudson River opposite NYC) Hudson County, New Jersey (Type Locality for Brucite and Hydromagnesite)

Hydromagnesite and Magnesite on Serpentine from Castle Point (Stevens Bluff), Hoboken, (west shore of Hudson River opposite NYC) Hudson County, New Jersey (Type Locality for Hydromagnesite)

Hydromagnesite with Aragonite from Castle Point (Stevens Bluff), Hoboken, (west shore of Hudson River opposite NYC) Hudson County, New Jersey (Type Locality for Hydromagnesite)

Hydromagnesite-Calcite-Dolomite var. Hydrodolomite from Texas, State Line District, Lancaster County, Pennsylvania

Hydronium Jarosite var. Karphosiderit from Charnay, Saône-et-Loire, France

Hydropyrochlore var. Kalipyrochlore from Lueshe Mine, Bwito, North Kivu Province, Democratic Republic of the Congo (Type Locality for Hydropyrochlore)

Hydropyrochlore var. Kalipyrochlore from Lueshe Mine, Bwito, North Kivu Province, Democratic Republic of the Congo (Type Locality for Hydropyrochlore)

Hydropyrochlore var. Kalipyrochlore from Lueshe Mine, Bwito, North Kivu Province, Democratic Republic of the Congo (Type Locality for Hydropyrochlore)

Hydroscarbroite and Scarbroite from South Bay, Scarborough, Yorkshire, England (Type Locality for Hydroscarbroite and Scarbroite)

Hydrotalcite-2H var. Manasseite from Jacupiranga Mine, Cajati, São Paulo, Brazil

Hydrotalcite-2H var. Manasseite with Magnetite from Jacupiranga Mine, Cajati, São Paulo, Brazil

Hydroxyapophyllite-(K) from Luck Stone Co. Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly Apophyllite-(KOH) and previously Hydroxyapophyllite) from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Luck Quarry, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from (Fairfax Quarry, 6.4 km west of Centreville), Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) and Calcite from Goose Creek Quarry, near Leesburg, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) and Laumontite on Prehnite from Arlington Quarry, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Calcite from (Luck Stone Quarry?), Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Centreville, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Chantilly Quarry, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fauquier County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Chantilly Quarry, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Virginia Trap Rock Quarry, southeast of Leesburg, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) on Prehnite from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) Stilbite, Prehnite from Chantilly Quarry, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with Calcite from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with Laumontite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with Natrolite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with Prehnite from Bull Run Quarry, near Conklin, Loudoun County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with Prehnite from Fairfax Quarry, 6.4 km west of Centreville, Fairfax County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) with twinned Calcite from Goose Creek Quarry, near Leesburg, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)), Stilbite, Prehnite from Goose Creek, Loudon County, Virginia

Hydroxyapophyllite-(K) (formerly Hydroxyapophyllite) on Gageite pseudomorphs after Inesite from N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Hydroxyapophyllite-(K) — formerly Apophyllite-(KOH) from N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Hydroxylapatite on Microcline from Sapo Mine, Conselheiro Pena, Minas Gerais, Brazil

Hydroxylborite (IMA2005-054) in Calcite from Titovskoye, Tas-Khayakhtakh Range, Polar Yakutia, Russia (Type Locality for Hydroxylborite)

Hydroxylherderite (twinned crystals) from Fletcher Mine, North Groton, Grafton County, New Hampshire

Hydroxylherderite and Hydroxylapatite from Jove Lauriano prospect, near Divino das Laranjeiras, Minas Gerais, Brazil

Hydroxylherderite and Quartz from Bennett Quarry, Buckfield, Oxford County, Maine

Hydroxylherderite and Quartz on Beryl from (Maine Feldspar Quarry), Mount Apatite, Auburn, Androscoggin County, Maine

Hydroxylherderite and Quartz var. Rose Quartz Crystals from Rose Quartz Locality, Plumbago Mountain, Oxford County, Maine

Hydroxylherderite on Albite from Divino das Laranjeiras, Doce valley, Minas Gerais, Brazil, Brazil

Hydroxylherderite on Albite from Xanda Mine, Virgem da Lapa, Minas Gerais, Brazil

Hydroxylherderite on Albite and Muscovite from Xanda Mine, near Virgen de Lapa, Minas Gerais, Brazil

Hydroxylherderite on Albite with Muscovite from Mount Apatite, Auburn, Androscoggin County, Maine

Hydroxylherderite on Muscovite and Albite from Mount Apatite, Auburn, Androscoggin County, Maine

Hydroxylherderite on Quartz from Waisenen Mine, Greenwood, Oxford County, Maine

Hydroxylherderite on Quartz from Bennett Quarry, Buckfield, Oxford County, Maine

Hydroxylherderite on Quartz with Cookeite from Bennett Quarry, Buckfield, Oxford County, Maine

Hydroxylherderite on Schorl Tourmaline from Shigar Valley, Skardu District, Baltistan, Gilgit-Baltistan, Pakistan

Hydroxylherderite with Fluorapatite from Campina Grande, Paraíba, Brazil

Hydroxylherderite, Bertrandite on Quartz from Black Mountain, Rumford, Maine

Hydroxylherderite, Moraesite , Microcline, Muscovite from Emmons Quarry, southeastern slope of Uncle Tom Mountain, Greenwood, Oxford County, Maine

Hydroxylherderite, Quartz, Topaz, Muscovite from Skardu Road, Baltistan, Gilgit-Baltistan, Pakistan

Hydroxylwagnerite (IMA 2004-009) from Dora Maira Massif, Val Varaita, Piedmont, Italy (Type Locality for Hydroxylwagnerite (IMA 2004-009))

Hydroxylwagnerite (IMA 2004-009) on Pyrophyllite from Doria Maira Massif, Cuneo, Italy (Type Locality for Hydroxylwagnerite)

Hydrozincite and Hemimorphite from Mina Ojuela, Mapimi, Durango, Mexico

Hydrozincite and Wulfenite from Sierra de Los Lamentos, Chihuahua, Mexico

Hydrozincite and Wulfenite from Sierra de Los Lamentos, Chihuahua, Mexico

Hydrozincite with Plattnerite from Mina Ojuela, Mapimi, Durango, Mexico

Hydrozincite with Plattnerite from Mina Ojuela, Mapimi, Durango, Mexico

Hypersthene, Almandine Garnet and Pyroxene from Barton Mine, Gore Mt, North River, New York

Iddingsite (Goethite+Quartz+Chlorite) with Olivine from Amboy, San Bernardino County, California

Idrialite from Skaggs Springs, Sonoma County, California

Ikunolite, Gladite, Bismuthinite from Westfield Mine, Felbertal, Salzburg, Austria

Ilesite and Jokokuite from Jokoku Mine, Kaminokuni, Hokkaido, Japan (Type Locality for Jokokuite)

Illite pseudomorph after Muscovite with Quartz, Zircon, Feldspar from Mount Malosa, Zomba Plateau, Malawi

Illite pseudomorphs after Unknown (Gieseckite) from Natural Bridge, Diana Township, Lewis County, New York

Ilmenite (twinned crystals) from Faraday Mine Property, near Bentley Lake, Bancroft, Ontario, Canada

Ilmenite (twinned crystals) from Faraday Mine Property, near Bentley Lake, Bancroft, Ontario, Canada

Ilmenite and Pyrite from Joppa Hill, Amherst, Hillsborough County, New Hampshire

Ilmenite and Rutile in blue Quartz from Aplite Quarry, Wood's Farm, Roseland, Nelson County, Virginia

Ilmenite and Rutile on Quartz from Davis Farm, Bethel, Windsor County, Vermont

Ilmenite in Quartz from Bridgewater, 1.6 km north of Rt. 133 bridge, Fairfield County, Connecticut

Ilmenite in Quartz from Bridgewater, 1.6 km north of Rt. 133 bridge, Fairfield County, Connecticut

Ilmenite on Albite from Bagicha, near Skardu, Pakistan

Ilmenite on Albite from Bagicha, near Skardu, Pakistan

Ilmenite on Albite from Baghica, Gilgit-Skardu Road, Gilgit-Baltistan, Pakistan

Ilmenite on Calcite with Nepheline from Vishnevye Mountains, Chelyabinsk Oblast', Southern Urals, Russia

Ilmenite on Quartz from Chip Mine, Uwharrie National Forest, Montgomery County, North Carolina

Ilmenite var. Menaccanite from Norway

Ilmenite var. Washingtonite from Litchfield County, Connecticut

Ilmenite var. Washingtonite in Quartz from Broadway at 6th Avenue, Manhattan Island, New York City, New York

Ilmenite var. Washingtonite in Quartz from 56th Street between Broadway and Sixth Avenue, Manhattan Island, New York City, New York County, New York

Ilmenite with minor Rutile on Quartz from Tormiq area, northwest of Skardu, Haramosh Mountains, Baltistan, Gilgit-Baltistan, Pakistan

Ilsemannite and Jordisite from Bullion Monarch Mine, Marysvale District, Piute County, Utah

Ilsemannite, Ferrimolybdite, Pyrite from Chino Mine, Santa Rita District, Grant County, New Mexico

Ilvaite from Miniera di Rio Marina, Isola d'Elba, Tuscan Archipelago, Livorno, Italy (Type Locality for Ilvaite)

Ilvaite from South Mountain District, Owyhee County, Idaho

Ilvaite from South Mountain District, Owyhee County, Idaho

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Mega Xhorio, Serifos Island, Greece

Ilvaite from First Sovietskiy Mine, Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Rio Marina, Isola d'Elba, Tuscan Archipelago, Livorno, Italy (Type Locality for Ilvaite)

Ilvaite from Second Sovietskiy Mine, Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from South Mountain District, Owyhee County, Idaho

Ilvaite from Isola d'Elba, Livorno Province, Tuscany, Italy (Type Locality for Ilvaite)

Ilvaite from Dalnegorsk, Primorskiy Kray, Russia

Ilvaite from Isola d'Elba, Tuscan Archipelago, Livorno, Italy (Type Locality for Ilvaite)

Ilvaite from Mega Xhorio, Serifos Island, Greece

Ilvaite from Laxey Mine, South Mountain District, Owyhee County, Idaho

Ilvaite from Calamita Mine, Isola d'Elba, Tuscan Archipelago, Livorno, Italy (Type Locality for Ilvaite)

Ilvaite and Quartz from South Mountain District, Owyhee County, Idaho

Ilvaite and Quartz from Laxey Mine, South Mountain District, Owyhee County, Idaho