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Caledonite: Pb5Cu2(CO3)(SO4)3(OH)6
Comments: Transparent, blue caledonite crystals. Location: Mammoth mine, Tiger, Pinal County, Arizona, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Cancrinite: Na6Ca2Al6Si6O24(CO3)2
Comments: Milky white, translucent fan-shaped sprays of cancrinite crystals. Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Carbonate-fluorapatite: Ca5(PO4,CO3)3F Apatite: Ca5(PO4)3(OH,F,Cl)
Comments: Pink, colliform carbonate-fluorapatite on matrix. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Carminite: PbFe+++2(AsO4)2(OH)2
Comments: Brownish red carminite crystals in matrix. Location: San Rafael mine, Gabbs, Nye County, Nevada, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Carnotite: K2(UO2)2V2O8·3(H2O)
Comments: Bright yellow, fluorescent crystals of carnotite on sandstone. Location: Anderson Mine, Yavapai County, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Caryopilite: (Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4
Comments: Small white balls of caryopilite next to larger barite crystals. Location: Langban, Varmland, Sweden. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Ceruleite: Cu2Al7(AsO4)4(OH)13·12(H2O)
Comments: Blue globular clusters of ceruleite. Location: Wheal Gorland, Gwennap, Cornwall, England. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Chabazite-Ca: (Ca0.5,Na,K)4[Al4Si8O24]·12H2O
Comments: Colorless hexagonal plates of chabazite. Location: Boral quarry, Bundoora, Victoria, Australia. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Chalcoalumite: CuAl4(SO4)(OH)12·3(H2O)
Comments: Pale bluish stellate twins of chalcoalumite on matrix. Location: Lavender Pit, Bisbee, Cohchise County, Arizona, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Chalcosiderite: CuFe+++6(PO4)4(OH)8·4(H2O)
Comments: Pale bluish transparent crystal of chalcosiderite on matrix. Location: Cornwall, England. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals