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Chalcostibite: CuSbS2
Comments: Dark gray crystals of chalcostibite on white quartz matrix. Location: Boldut mine, Cavnic Maramures, Rumania. Scale: 7 x 7 x 3.5 cm. © Fabre Minerals
Chalcothallite: (Cu,Fe)6Tl2SbS4
Comments: Gray-black, platy chalcothallite aggregates in matrix. Location: Taseq Slope, Ilimaussaq Complex, Narsaq, Kitaa, West Greenland, Denmark. Scale: Specimen Size 6x20 mm. © Diederik Visser
Challacolloite: KPb2Cl5
Comments: White to transparent challacolloite crystals on matrix. Location: Eruption of 1855, Mount Vesuvius, Campania, Italy. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Chambersite: Mn3B7O13Cl
Comments: Tetragonal crystals of chambersite extracted from salt dome deposits. Location: Barkers Hill, Mont Belvieu, Chambers County, Texas, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Chamosite: (Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8
Comments: Dark green sectile massive chamosite. Location: Jalgaon, Maharashtra, India. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Changbaiite: PbNb2O6
Comments: BSE image of a zircon grain with inclusions of bastnasite? (bs), columbite (cb), cerofluorite (ce), chanbaiite (ch), cryolite (cry), thorite (th), xenotime (xe) and niobium-rich iron oxides (Nb-Fea). Location: Rhyolite laccoliths from the Sierra Blanca Peaks, Trans-Peco region, Texas. (AmMin, v 74:865). Scale: See Image. © American Mineralogist
Chaoite: C
Comments: Dark masses of chaoite intermixed with graphite on rock shocked by meteorite impact. Location: Ries Crater, Bopfingen, Bavaria, Baden-Wurttemberg. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chapmanite: Sb+++Fe+++2(SiO4)2(OH)
Comments: Green, earthy chapmanite on quartz-sulfide matrix. Location: Neue Hoffnung Gottes Mine, Bräunsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Charlesite: Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12·26(H2O)
Comments: 1 cm white crystal of charlesite on calcite with small (2 mm) octahedral crystals of galena. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 2.5 cm. © John Veevaert
Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O)
Comments: Polished slab of purple charoite. Location: Murun Massif, Chara River, Davan, Torgo River Basin, Aldan Shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 6.5 cm. © Thomas Witzke / Abraxas-Verlag
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
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) Tokkoite: K2Ca4[Si7O18(OH)](F,OH)
Comments: Yellow crystalline tokkoite intermixed with purple charoite (viewed cross-sectional to fiber direction). Location: Murun, Aldan, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Polished slab of deep purple chariote with inclusions of black augite, white feldspar and orange tinaksite. Location: Murun, Siberia, Russia. Scale: Picture size 10 cm. © Kevin Ward
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
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
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