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Cabriite: Pd2SnCu Sperrylite: PtAs2
Comments: Small crystal of dull gray cabriite on a larger tin-white sperrylite crystal. Location: Dzhezhazgan, Kazakhstan. Scale: Crystal size 1.5 mm. © John Veevaert
Calcioandyrobertsite-1M: KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) Tennantite: (Cu,Fe)12As4S13
Comments: Vein of blue calcioandyrobertsite in massive dark gray tennantite. The vein of calcioandyrobertsite extends for 0.8cm. Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Specimen size 1.1 x 0.5 cm. © John Veevaert
Caracolite: Na3Pb2(SO4)3Cl
Comments: Flat lying hexagonal prismatic crystals of caracolite on matrix. Location: Challacollo Mine near Oficina Victoria, Chile. Scale: Crystal size 0.5 cm. © John Veevaert
Carletonite: KNa4Ca4Si8O18(CO3)4(OH,F)·(H2O)
Comments: Several crystals of blue and white carletonite. Location: Mt. St. Hilaire, Quebec, Canada. Scale: 2.8 x 2.7 cm. © John Veevaert
Carrollite: Cu(Co,Ni)2S4
Comments: Carrollite crystal with minor attached matrix. Location: Komoto-Frond in the Democratic Republic of the Congo. Scale: 1.2 cm. © John Veevaert
Catapleiite: (Na,Ca,[ ])2ZrSi3O9·2(H2O) Aegirine: NaFe+++Si2O6
Comments: Clear crystals of catapleiite with an attached 1.8 cm prismatic crystal of dark aegirine. Location: Mt. St. Hilaire, Quebec, Canada. Scale: 3.5 x 2.2 cm. © John Veevaert
Chalcocite: Cu2S
Comments: Chalcocite crystals in this specimen vary in size up to 1.2 cm across. Location: Bristol nr. Hartford, Connecticut, USA. Scale: 7.6 x 4 cm. © John Veevaert
Chalcophyllite: Cu++18Al2(AsO4)3(SO4)3(OH)27·33(H2O)
Comments: Altered rhyolite vug lined with chalcophyllite crystals. The largest crystal is 0.5 cm across and several have the perfect "stop sign" hexagon form. Location: Majuba Hill Mine, Pershing County, Nevada, USA. Scale: Picture size 2 cm. © John Veevaert
Chalcostibite: CuSbS2
Comments: Partial crystal of chalcostibite. The crystal is partially altered to blue azurite and green malachite. Location: Gar El Anz, Morocco. Scale: 3 x 1.8 cm. © John Veevaert
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