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Cuprocopiapite: CuFe+++4(SO4)6(OH)2·20(H2O)
Comments: Grayish green crusts of cuprocopiapite on gypsum. Location: Copper Queen Mine, Double Mountain Fork of Brazois River, Stonewall County, Texas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cuprorivaite: CaCuSi4O10
Comments: Pale blue grains of cuprorivaite. Location: Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cuprotungstite: Cu++3(WO4)2(OH)2
Comments: Tan coatings of cuprotungstite on quartz. Location: Lida, Esmeralda County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cuprotungstite: Cu++3(WO4)2(OH)2 Jixianite: Pb(W,Fe+++)2(O,OH)7
Comments: Reddish brown crystal druse of jixianite with minor tan cuprotungstite. Location: Apache Mine, Hidalgo County, New Mexico, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Curetonite: Ba4Al3Ti(PO4)4(O,OH)6
Comments: Translucent tabular crystal of curetonite in crystalline barite. Location: Near Golconda, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cuspidine: Ca4Si2O7(F,OH)2
Comments: Tan spear-shaped micro crystals of cuspidine in diopside. Location: San Vito Quarry, Vesuvius, Napoli, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cuzticite: Fe+++2Te++++++O6·3(H2O)
Comments: Thin scaly yellow-brown crust of cuzticite on quartz. Location: Mina Bambollita, Moctezuma, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cyanochroite: K2Cu(SO4)2·6(H2O)
Comments: Pale blue crystal cluster of cyanochroite. Location: Eruption of 1870, Mount Vesuvius, Napoli, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cyanotrichite: Cu4Al2(SO4)(OH)12·2(H2O) Azurite: Cu3(CO3)2(OH)2
Comments: Blue, hairy crystals of cyanotrichite with dark-blue, blocky azurite on a green, malachite matrix. Location: Maid of Sunshine Mine, Cochise County, Arizona, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Cyanotrichite: Cu4Al2(SO4)(OH)12·2(H2O)
Comments: Blue, acicular sprays of cyanotrichite on a gray matrix. Location: Maid of Sunshine Mine, Cochise County, Arizona, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Cylindrite: Pb3Sn4FeSb2S14
Comments: Cylindrical crystals of cylindrite in granular tin sulfide ore. Location: Montserrat Mine, Poopo, Oruro, Bolivia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cymrite: BaAl2Si2O8·(H2O)
Comments: Pearly white cymrite with jadeite in greywacke rock. Location: Pacheco Pass, Santa Clara County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Dadsonite: Pb21Sb23S55Cl
Comments: Gay metallic massive dadsonite. Location: Wolfsberg, Harzgerode, Sachsen-Anhalt, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Dalyite: K2ZrSi6O15 Janhaugite: (Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3
Comments: Tan crystalline dalyite (arrow) with reddish brown janhaugite. Location: Gjerdingen, Nordmark, north of Oslo, Oslo, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Darapskite: Na3(SO4)(NO3)·(H2O)
Comments: White crystalline granular darapskite. Location: Iquique, Tarapaca, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Daubreelite: Fe++Cr2S4 Alabandite: MnS
Comments: Daubreelite (D), bright metallic white, with alabandite (A) (dull yellow) as inclusions in a polished section of an achondrite meteorite. Location: Norton County, Kansas. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Davreuxite: MnAl6Si4O17(OH)2
Comments: Pale yellow fibrous davreuxite on quartz. Location: Ottre, Luxembourg, Belgium. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Davyne: Na4K2Ca2Si6Al6O24(SO4)Cl2
Comments: Yellow translucent micro crystal of davyne in sanidine. Location: Laacher See, Rheinland-Pfalz, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Defernite: Ca6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x=0,5) Vaterite: CaCO3 Manganite: MnO(OH)
Comments: Opaque white fibrous vaterite with red defernite and black manganite. Location: Kombat Mine, Otavi, Otjozondjupa, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Delindeite: Ba2(Na,K,[ ])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2
Comments: pale pink acicular crystal sprays of delindeite on matrix. Location: Diamond Jo Quarry, Hot Spring County, Arkansas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species