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Bariandite: Al0.6V8O20·9(H2O)
Comments: Dark bluish black bladed radiating aggregates of bariandite. Location: Mounana mine, Franceville, Haut-Ogooué, Gabon. Scale: See Image. © Rruff Database
Bario-olgite: Na(Ba,Sr,Na,REE)PO4 Manaksite: KNaMn++Si4O10
Comments: Pale brown massive manaksite associated with grayish-green bario-olgite, purple ussingite and colorless serandite. Location: Palitra pegmatite, Kedykverpakhk Mountain, Lovozero massif, Kola Peninsula, Russia. Scale: See Image. © Rruff Database
Benavidesite: Pb4(Mn,Fe)Sb6S14
Comments: Gray tabular benavidesite crystals associated with quartz. Location: Bear Basin Mines, Bear Basin, North Bend, King County, Washington, USA. Scale: See Image. © Rruff Database
Bicchulite: Ca2Al2SiO6(OH)2
Comments: White microcrystalline bicchulite associated with calcite and vesuvianite. Location: Fuka Mine, Bitchu-Cho, Okayama Prefecture, Chugoku Region, Honshu Island, Japan. Scale: See Image. © Rruff Database
Bobdownsite: Ca9Mg(PO3F)(PO4)6
Comments: Colorless hexagonal tabular bobdownsite crystals in the type sample. Location: Big Fish River, Yukon Territory, Canada. Scale: See Image. © Rruff Database
Bobtraillite: (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12·12H2O
Comments: Transparent, hexagonal bobtraillite prisms, co-type material. Location: Mont Saint-Hilaire, Rouville County, Quebec, Canada. Scale: See Image. © Rruff Database
Bowieite: (Rh,Ir,Pt)1.77S3
Comments: Epoxy grain mount of polished gray metallic grains or bowieite. Location: Novoseltsi, Burgas Oblast (Bourgas Oblast), Bulgaria. Scale: See Image. © Rruff Database
Brewsterite-Ba: (Ba,Sr)Al2Si6O16·5(H2O)
Comments: Colorless to off-white striated prismatic brewsterite-Ba crystals. Location: Strontian, North West Highlands (Argyllshire), Scotland, UK. Scale: See Image. © Rruff Database
Brizziite-III: NaSb+++++O3 Brizziite-VII: NaSb+++++O3
Comments: Colorless thin hexagonal plates of brizziite. Brizzite-VII and brizzite-III are the same mineral with different Dana classification numbers. Location: Le Cetine di Cotorniano, Chiusdino, Siena Province, Tuscany, Italy. Scale: See Image. © Rruff Database
Brizziite-VII: NaSb+++++O3 Brizziite-III: NaSb+++++O3
Calciogadolinite: CaREE(Fe+++)Be2Si2O10 Gadolinite-(Y): Y2Fe++Be2Si2O10
Comments: Black vitreous, metamict massive gadolinite-(Y) also known as calcian gadolinite. Location: Ytterøya Mine, Røvika, Ytterøya (island), Levanger, Nord-Trondelag, Norway. Scale: See Image. © Rruff Database
Calciouranoite: (Ca,Ba,Pb)U2O7·5(H2O) Metacalciouranoite: (Ca,Na,Ba)U2O7·2(H2O)
Comments: Cryptocrystalline looking, greasy yellow blotches, of amorphous calciouranoite (probably, in part, dehydrated to matacalciouranoite). Location: Oktyabr'skoye Mo-U deposit, east Transbaikal region, Russia. Scale: See Image. © Rruff Database
Cameronite: AgCu7Te10 Rickardite: Cu7Te5 Vulcanite: CuTe
Comments: Gray metallic massive cameronite showing subconchoidal fracture associated with purple rickardite and bronzy plates of vulcanite in a mass of tellurium, co-type specimen. Location: Good Hope mine, Vulcan District, Gunnison County, Colorado, USA. Scale: See Image. © Rruff Database
Cebaite-(Ce): Ba3Ce2(CO3)5F2
Comments: Gemmy yellow to orange-yellow massive cebaite-(Ce); some cleavage evident, associated with green aegirine. Location: Baiyun-Obo mine, Inner Mongolia, China. Scale: See Image. © Rruff Database
Cerite-(Ce): Ce+++9Fe+++(SiO4)6[(SiO3)(OH)](OH)3
Comments: Brownish pink, thin, massive crystalline coating of cerite-(Ce). Location: Bastnas, Riddarhyttan, Sweden. Scale: See Image. © Rruff Database
Cernyite: Cu2CdSnS4
Comments: Gray massive, metallic cernyite. Location: Hugo Mine, Keystone, Keystone District, Pennington County, South Dakota, USA. Scale: See Image. © Rruff Database
Cesplumtantite: (Cs,Na,Ca)2(Pb,Sb+++,Sn)3Ta8O24
Comments: Brownish yellow cesplumtantite aggregate grains. Location: Manono, Shaba, Congo. Scale: See Image. © Rruff Database
Chabourneite: (Tl,Pb)21(Sb,As)91S147 Smithite: AgAsS2
Comments: Black metallic chabourneite with conchoidal fracture, associated with yellow-red realgar and deep-red smithite. Location: Jas Roux, Pelvoux Mt., Valgaudemar, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France. Scale: See Image. © Rruff Database
Chistyakovaite: Al(UO2)2(AsO4)2(F,OH)·6.5H2O
Comments: Platy fragment of a pale yellow crystal of chistyakovaite sealed in plastic bag, co-type material. Location: Bota-Burum U deposit, Kazakhstan. Scale: See Image. © Rruff Database
Clinobarylite: BaBe2Si2O7
Comments: Radiating group of colorless flattened bladed clinobarylite crystals. Location: Hackmann Valley, Yukspor Mountain, Khibiny, Kola, Russia. Scale: See Image. © Rruff Database