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Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O) Tinaksite: K2Na(Ca,Mn++)2(Ti,Fe)O[Si7O18(OH)]
Comments: Yellow-brown prismatic tinaksite crystals in purple charoite with black aegirine. Location: Murun, Aldan Uplift, Chara and Olekma Rivers, near Olekminsk, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O) Fedorite: KNa4Ca4(Al,Si)16O36(OH,F)4·6(H2O)
Comments: Tan crystalline platy fedorite in pale violet charoite. Location: Murun, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chayesite: K(Mg,Fe++)4Fe+++(Si12O30) Merrihueite: (K,Na)2(Fe++,Mg)5Si12O30
Comments: A sharp, chemically zoned crystal of copper-brown merrihueite(?) (see Lapis-Magazine 4/2002 Page 38/39) overgrown on bluish chayesite. Location: Basalt quarry, Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria. Scale: Crystal Size 0.15 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Chayesite: K(Mg,Fe++)4Fe+++(Si12O30)
Comments: Crystalline aggregate of rusty red, thin tabular hexagonal plates of chayesite stacked along the c-axis on matrix. Location: Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria. Scale: Crystal size 0.5 mm. © Tom Loomis / Dakota Matrix
Chekhovichite: (Bi,Pb,Fe)2Te4O11
Comments: Crude, white transparent subhedral chekhovichite crystal. Location: Zod Deposit, 14 km East of Verdenis, Armenia. Scale: Specimen Size 2x7 mm. © Diederik Visser
Chelkarite: CaMgB2O4Cl2·7(H2O) (?)
Comments: Minute transparent nearly colorless microcrystals of chelkarite. Location: Chelkar, Zapadno-Kazahstan, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chenevixite: Cu2Fe+++2(AsO4)2(OH)4·(H2O)
Comments: Green micro crystals of chenevixite on matrix. Location: Majuba Hill, Pershing County, Nevada, USA. Scale: Size Not Given. © John Veevaert
Chenguodaite: Ag9FeTe2S4
Comments: BSE Image of coexisting chenguodaite (U1) and galena (Gn), part of the grain is extracted for Gandolfi camera diffraction. (Chinese Science Bulletin 2008, 53(22)). Location: Bunan deposit, Shandong Province, People’s Republic of China. Scale: See Image. © Chinese Science Bulletin
Chenite: Pb4Cu(SO4)2(OH)6
Comments: Sky blue crystalline coating of chenite on matrix. Location: Silberhutte, Altenau, Harz Mountains, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cheralite-(Ce): (Ce,Ca,Th)(P,Si)O4
Comments: Brown to tan, massive cheralite-(Ce) showing cleavage traces. Location: Uranium King Mine, Trent Creek, Encampment Copper District, Sierra Madre Mts., Carbon Co., Wyoming, USA. Scale: Picture size 1.4 cm. © Paul M. Schumacher
Cherepanovite: RhAs Cooperite: (Pt,Pd,Ni)S Platinum: Pt
Comments: Creamy-grayish fractured grains of cherepanovite with gray granular cooperite and white massive grains of iridian ruthenian platinum. Polished section in reflected light. Location: Placer Deposit, Northern Pekul'nei River, Pekul'nei Range, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia. Scale: Picture size 0.12 mm. © Thomas Witzke / Abraxas-Verlag