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Chabourneite: (Tl,Pb)21(Sb,As)91S147 Smithite: AgAsS2
Comments: Black metallic chabourneite with conchoidal fracture, associated with yellow-red realgar and deep-red smithite. Location: Jas Roux, Pelvoux Mt., Valgaudemar, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France. Scale: See Image. © Rruff Database
Chaidamuite: (Zn,Fe++)Fe+++(SO4)2(OH)ˇ4(H2O)
Comments: Pale yellow earthy coatings of chaidamuite with brown limonite on friable matrix. Location: Getchell Mine, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chalcanthite: CuSO4ˇ5(H2O) Chalcocyanite: CuSO4
Comments: White to pale bluish chalcocyanite with darker bluish chalcanthite. The mineral is hygroscopic and must be stored in a closed box. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Chalcanthite: CuSO4ˇ5(H2O) Dolerophanite: Cu2(SO4)O Fedotovite: K2Cu++3(SO4)3O
Comments: Brown crystals of dolerophanite with blue chalcanthite and green fedotovite. Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag
Chalcanthite: CuSO4ˇ5(H2O) Fedotovite: K2Cu++3(SO4)3O
Comments: Green fedotovite with pale blue chalcanthite. Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Chalcanthite: CuSO4ˇ5(H2O)
Comments: Fibrous columnar crystalline chalcanthite. Location: Planet Mine, La Paz County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chalcoalumite: CuAl4(SO4)(OH)12ˇ3(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
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
Chalcocite: Cu2S Eskolaite: Cr2O3
Comments: Green crystalline eskolaite on massive chalcocite. Location: Lubelin, Poland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chalcocyanite: CuSO4 Chalcanthite: CuSO4ˇ5(H2O)
Chalcomenite: CuSeO3ˇ2(H2O)
Comments: Blue crystals of chalcomenite on matrix. Location: El Dragón mine, Quijarro province, Potosí, Bolivia. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Chalconatronite: Na2Cu(CO3)2ˇ3(H2O)
Comments: Crystalline crusts of blue chalconatronite on sandstone. Location: Slick Rock, Egnar Area, San Miguel County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Chalconatronite: Na2Cu(CO3)2ˇ3(H2O) Sanromanite: Na2CaPb3(CO3)5 Juangodoyite: Na2Cu(CO3)2
Comments: Yellowish, long balded sanromanite crystals in vug with platy, blue juangodoyite replacing green chalconatronite. Location: Santa Rosa mine, Iquique Province, Tarapaca, Chile. Scale: Picture size 3 mm. © Tom Loomis / Dakota Matrix
Chalcophanite: (Zn,Fe++,Mn++)Mn++++3O7ˇ3(H2O)
Comments: Large mass of rounded gray-black chalcophanite. Location: Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA. Scale: 14x11x7 cm. © John Betts - Fine Minerals
Chalcophyllite: Cu++18Al2(AsO4)3(SO4)3(OH)27ˇ33(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
Chalcopyrite: CuFeS2 Quartz: SiO2
Comments: Well-formed crystals of chalcopyrite and quartz. Location: Boldut mine, 61 level (350 meters deep), Cavnic, Maramures, Rumania. Scale: 5.5 x 3.5 cm. © Fabre Minerals
Chalcopyrite: CuFeS2 Moncheite: (Pt,Pd)(Te,Bi)2
Comments: White moncheite with chalcopyrite (orange, blue and violet tarnishing colors) in silicate matrix. Polished section (from microprobe analysis) in reflected light. Location: Lukkulaisvaara ultrabasic Massif, Olanga (Oulanka) River, Oulanka plutonic complex, Karelia Republic, Northern Region, Russia. Scale: Picture size 0.11 mm. © Thomas Witzke / Abraxas-Verlag
Chalcopyrite: CuFeS2 Oulankaite: (Pd,Pt)5(Cu,Fe)4SnTe2S2 Telargpalite: (Pd,Ag)3Te Tulameenite: Pt2FeCu
Comments: Gray long-prismatic crystal of oulankaite with light grayish telargpalite and pale yellowish-white rims of tulameenite in massive yellowish chalcopyrite. Polished section (from microprobe analysis) in reflected light. Location: Lukkulaisvaara ultrabasic Massif, Olanga (Oulanka) River, Oulanka plutonic complex, Karelia Republic, Northern Region, Russia. Scale: Picture size 0.12 mm. © Thomas Witzke / Abraxas-Verlag
Chalcosiderite: CuFe+++6(PO4)4(OH)8ˇ4(H2O)
Comments: Pale bluish transparent crystal of chalcosiderite on matrix. Location: Cornwall, England. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
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