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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
Metatorbernite: Cu(UO2)2(PO4)2·8(H2O) Schoepite: (UO2)8O2(OH)12·12(H2O)
Comments: Green, tabular crystals of metatorbernite and acicular, yellow schoepite on matrix. Location: Musonoi mine, Kolwezi, Shaba, (Katanga), Congo (Zaïre). Scale: Picture size 2.5 mm. © Paul M. Schumacher
Metatorbernite: Cu(UO2)2(PO4)2·8(H2O)
Comments: Green, square, tabular crystals of metatorbernite on matrix. Location: Wheal Basset, Illogan, Cornwall, England, UK. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Metatyuyamunite: Ca(UO2)2V2O8·3(H2O)
Comments: Bright yellow bladed crystals of metatyuyamunite. Location: Mashamba mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Metatyuyamunite: Ca(UO2)2V2O8·3(H2O) Metatorbernite: Cu(UO2)2(PO4)2·8(H2O)
Comments: Yellow, platy metatyuyamunite and transparent, tabular green metatorbernite crystals with a minor amount of white, snowy-looking saleeite. Location: Mashamba West Mine, Kolwezi, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 0.5 cm. © Paul M. Schumacher
Metauranocircite: Ba(UO2)2(PO4)2·6-8(H2O)
Comments: Lemon yellow platy meta-uranocircite crystals on matrix. Location: Schneeberg, Saxony, Germany. Scale: Crystal size 2 mm. © Tom Loomis / Dakota Matrix
Metauranocircite: Ba(UO2)2(PO4)2·6-8(H2O) Uranocircite: Ba(UO2)2(PO4)2·12(H2O)
Comments: Brilliant, fluorescent yellow green crystals of uranocircite altered to meta-uranocircite. Location: Bergen, Vogtland, Saxony, Germany. Scale: 2.3 x 2.2 cm. © John Veevaert
Comments: Yellow crystals of meta-uranocircite. Location: Krunkelbachtal, Baden-Wurttemberg, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: Crystal fragment of uranocircite fracturing due to dehydration to meta-uranocircite. The most common are 100 and 010 fractures, with 110 close behind. But notice the 210 and 410 fractures (breaks) as well. Location: . Scale: Crystal size 2x3.5 cm. © Paul M. Schumacher