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Metahaiweeite: Ca(UO2)2Si6O15·n(H2O), n<5 Haiweeite: Ca[(UO2)2Si5O12(OH)2]·3(H2O)
Comments: Pale yellow scaly metahaiweeite coating on quartz with minute haiweeite acicular crystals. Location: Coso Uranium Mine, Inyo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metaheinrichite: Ba(UO2)2(AsO4)2·8(H2O)
Comments: Siliceous jasperoid with a black crust of uraninite (?) and bright canary yellow crystals of metaheinrichite crystals to 2.5mm across. Location: White King Mine, Lakeview, Oregon, USA. Scale: Picture size 2 cm. © John Veevaert
Comments: Very pale greenish crystals of metaheinrichite on matrix. Location: Schmiedestollenhalde mine, Wittichen, Schenkenzell, Schwartzwald (Black Forest), Baden-Württemberg, Germany. Scale: Picture size 0.5 cm. © Paul M. Schumacher
Metahewettite: CaV6O16·3(H2O)
Comments: Deep red, vibrant, radial micro crystals of metahewettite to 3mm in diameter on matrix. Location: Cactus Rat mine, Grand County, Utah. Scale: 4 x 4 x 2 cm. © John Veevaert
Metahohmannite: Fe+++2[O(SO4)2]·4(H2O) Hohmannite: Fe+++2(SO4)2(OH)2·7(H2O)
Comments: Orange opaque prismatic microcrystals of hohmannite mixed with yellow metahohmanite. Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metahohmannite: Fe+++2[O(SO4)2]·4(H2O)
Comments: Orange-yellow earthy massive metahohmannite with orange hohmannite. Location: Quetena, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metakottigite: (Zn,Fe+++,Fe++)3(AsO4)2·8((H2O),OH)
Comments: Bladed crystalline sprays of metakottigite crystals on matrix. Location: Ojuela mine, Mapimi, Durango, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Metalodevite: Zn(UO2)2(AsO4)2·10(H2O)
Comments: Micro crystals of pale yellow metalodevite to 1 mm. Location: Rivieral, Lodeve, Herault, Languedoc-Roussillon, France. Scale: Specimen Size 5 x 2 x 3 cm. © Tom Loomis / Dakota Matrix
Metamunirite: Na2[V+++++2O6] or NaVO3
Comments: Colorless, acicular crystals of metamunirite. Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado, USA. Scale: Picture size 1.6 mm. © Thomas Witzke / Abraxas-Verlag
Metanovacekite: Mg(UO2)2(AsO4)2·4-8(H2O) Novacekite: Mg(UO2)2(AsO4)2·12(H2O)
Comments: Yellow, translucent platy novacekite/metanovacekite crystal aggregate. Location: Rabejac Mine, Olmet, Herault, France. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metanovacekite: Mg(UO2)2(AsO4)2·4-8(H2O)
Comments: Bright yellow crystalline metanovacekite coatings on white crystalline gypsum. Location: Las Animas Mine, Municipio do Heuiles Serdan, Chihuahua, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metarossite: CaV2O6·2(H2O)
Comments: Light yellow metarossite on sandstone. Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Comments: Bright yellow platy crystals to about 0.5mm covering sandstone matrix. Location: Arrowhead Claim, San Miguel Co., Colorado, USA. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Metaschoderite: Al2(PO4)(VO4)·6(H2O)
Comments: Orange crystalline metaschoderite crust on shale. Location: 25 miles east of Eureka, Fish Creek Range, Eureka County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metaschoepite: UO3·n(H2O)(n<2) Antlerite: Cu3(SO4)(OH)4
Comments: Yellow crystals of metaschoepite with green antlerite. Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O) Tamarugite: NaAl(SO4)2·6(H2O)
Comments: Orange metasideronatrite with white tamarugite. Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O) Ungemachite: K3Na8Fe+++(SO4)6(NO3)2·6(H2O)
Comments: Translucent rounded ungemachite microcrystal on yellow metasideronatrite. Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metastibnite: Sb2S3 Sulfur: S8
Comments: Red coatings of metastibnite with yellow sulfur. Location: Steamboat Springs, Washoe County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metastudtite: UO4·2(H2O)
Comments: White acicular microcrystal metastudtite clusters on dark yellow to brown sklodowskite grains. Location: Musonoi, Katanga, Shaba, Zaire. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Metaswitzerite: Mn3(PO4)2·4(H2O)
Comments: Bladed crystalline sprays of milk chocolate-colored metaswitzerite crystals. Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals