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Claudetite: As2O3 Arsenic: As
Comments: Colorless prismatic crystal of claudetite on native arsenic. Location: Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 2 mm. © Thomas Witzke / Abraxas-Verlag
Clausthalite: PbSe Schlemaite: (Cu,[ ])6(Pb,Bi)Se4 Eucairite: CuAgSe
Comments: Reflected-light digital-image of the intermixed schlemaite grain in type sample F2, from which the reflectance, crystallographic and crystal-structure data were obtained. (CanMin, v 41, p 1435). Location: "Tiber" dike, -855-m level, block 5128, main shaft # 371, Niederschlema-Alberoda vein-type uranium depost at Hartensein, Erzgebirge, Germany. Scale: See Picture. © Canadian Mineralogist
Clausthalite: PbSe
Comments: black massive and botryoidal clausthalite on matrix. Location: Lasovice, Mittelbuhmen, Stredocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cleusonite: Pb(U++++,U++++++)(Ti,Fe++,Fe+++)20(O,OH)38
Comments: Black submetallic ceusonite crystals in matrix. Location: Kaisererbruch, Rauris, Salzburg, Austria. Scale: Specimen Size 3x4.5 cm. © Diederik Visser
Cliffordite: UTe3O9
Comments: Small greenish crystals of cliffordite encrusting matrix. Location: Candelaria Mine, Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Clinoatacamite: Cu2(OH)3Cl
Comments: Green clinoatacamite on halite and anhydrite. Location: Bernburg, Stassfurt Deposit, Saxony-Anhalt, Germany. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Clinobarylite: BaBe2Si2O7
Comments: Radiating group of colorless flattened bladed clinobarylite crystals. Location: Hackmann Valley, Yukspor Mountain, Khibiny, Kola, Russia. Scale: See Image. © Rruff Database
Clinobisvanite: BiVO4
Comments: Numerous yellow to yellowish-orange sub-mm crystals of clinobisvanite on matrix. Location: Linka Mine, Lander County, Nevada, USA. Scale: 2.2 x 2.5 cm. © John Veevaert
Comments: Deep yellow platy crystals of clinobisvanite to less than 0.2mm. Location: Linka mine, Lander Co., Nevada, USA. Scale: Picture size 0.5 cm. © Tom Loomis / Dakota Matrix
Clinocervantite: Sb+++Sb+++++O4
Comments: White crystals of Clinocervantite. Location: Cetine di Cotorniano mine (Cetine mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag