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Chvaleticeite: (Mn++,Mg)SO4·6(H2O)
Comments: Powdery mass of chvaleticeite. Location: Chvaletice, Bohemia, Vychodocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chvilevaite: Na(Cu,Fe,Zn)2S2
Comments: Black metallic chvilevaite in sandstone. Part of a drillcore. Location: La Serena, Region III, Chile. Scale: Specimen Size 0.8x1.8 cm. © Diederik Visser
Cianciulliite: Mn++++(Mg,Mn++)2Zn2(OH)10·2-4(H2O)
Comments: SEM image of a typical cianciulliite crystals. The abundant incipient cleavage is very obvious. (AmMin, v76:1708). Location: Franklin, New Jersey, USA. Scale: Field of view is 0.3 mm. © American Mineralogist
Cinnabar: HgS Edoylerite: Hg++3Cr++++++O4S2
Comments: Yellow prismatic crystals of edoylerite with red cinnabar. Location: Clear Creek Claim (Clear Creek Mine), New Idria district, San Benito Co., California, USA. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Cinnabar: HgS
Comments: Red single hexagonal (Trigonal) crystal of cinnabar on dolomite. Location: Fenghuang, Hunan Province, Peoples Republic of China. Scale: Crystal size 1 cm. © Dave Barthelmy
Ciprianiite: Ca4[(Th,U)(REE)]2(Al,[ ])2[Si4B4O22](OH,F)2
Comments: Black crystal of ciprianiite in quartz. Location: Monte Cavalluccio, Capagnano, Roma, Lazio, Italy. Scale: Picture size 2 mm. © Paul M. Schumacher
Clairite: (NH4)2Fe+++3(SO4)4(OH)3·3(H2O) Rostite: AlSO4(OH,F)·5(H2O)
Comments: Brownish crystals of clairite on white massive rostite. Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Claraite: (Cu,Zn)3(CO3)(OH)4·4(H2O)
Comments: Green, round spherical grain of claraite on fluorite. Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Claringbullite: Cu++4(OH)7Cl
Comments: Velvety micro botryoids of claringbullite lining vug in slag. Location: Val Varenna, Pegli, Genova, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Clarkeite: (Na,Ca,Pb)(UO2)O(OH)·0-1(H2O)
Comments: Massive orange clarkeite. Location: Bjertnes,Krøderen, Buskerud, Norway. Scale: Picture size 8 mm. © Thomas Witzke / Abraxas-Verlag