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Curienite: Pb(UO2)2V2O8ˇ5(H2O) Francevillite: (Ba,Pb)(UO2)2V2O8ˇ5(H2O)
Comments: Intense yellow curienite and orange francevillite. Location: Mouonana, Haut-Ogoue, Gabon. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Curite: Pb3+x(H2O)2[(UO2)4+x(OH)3-x]2, x~0.5
Comments: Orangish red curite crystals. Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
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
Cuspidine: Ca4Si2O7(F,OH)2 Jasmundite: Ca11(SiO4)4O2S
Comments: Tan-brownish crystals of jasmundite and dark green cuspidine with gehlenite and spinel in matrix. Location: Bellerberg, Eifel, Germany. Scale: Not Given. © Diederik Visser
Cuzticite: Fe+++2Te++++++O6ˇ3(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)2ˇ6(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
Cyanophyllite: Cu++5Al2(SbO4)3(OH)7ˇ9(H2O)
Comments: Small pale green cyanophyllite crystals with blue azurite on matrix. Location: Monte Avanza, Forni Avoltri, Udine, Italy. Scale: Picture size 1 cm. © Diederik Visser
Cyanotrichite: Cu4Al2(SO4)(OH)12ˇ2(H2O)
Comments: Blue, hairy crystals of cyanotrichite. Location: Grandview mine, Grand Canyon, Coconino County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Cyanotrichite: Cu4Al2(SO4)(OH)12ˇ2(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
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: BaAl2Si2O8ˇ(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
Cyrilovite: NaFe+++3(PO4)2(OH)4ˇ2(H2O)
Comments: Greenish-yellow crystals of cyrilovite in matrix. Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Dachiardite-Ca: (Ca,Na2,K2)5Al10Si38O96ˇ25(H2O)
Comments: Milky bladed aggregates of dachiardite-Ca with mordenite-Na in cavities in basalt. Location: Cape Lookout Quarry, Tillamook Co., Oregon, USA. Scale: Specimen Size 2.5x4 cm. © Diederik Visser
Dachiardite-Na: (Na2,Ca,K2)4Al4Si20O48ˇ13(H2O)
Comments: Orange flat radial crystals of dachiardite-Na to 2cm across on matrix. Location: Alpe di Siusi, Bolzano, Trentino Alto Adige, Italy. Scale: Specimen size: 6x4x3cm. © Tom Loomis / Dakota Matrix
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
Danalite: Fe++4Be3(SiO4)3S
Comments: Orange irregular gemmy danalite in matrix. Location: Iron Mountain, Winston, New Mexico, USA. Scale: See Image. © Rruff Database
Danburite: CaB2(SiO4)2
Comments: Very-fine, large, single transparent crystal of danburite with minor crystals of colorless calcite all around the base. Location: Charcas, San Luis Potosi, Mexico. Scale: 4 x 2.5 x 9.5 cm. © Dan Weinrich
Danielsite: (Cu,Ag)14HgS8
Comments: BSE image showing danielsite (D - light gray) and stromeyerite (S - slightly darker) occupy the center of the triangular area and are surrounded by chalcocite (C - black).The anglesite (A) is white. Location: Pocket of primary sulfides in a quartz vein near Coppin Pool, Western Australia. (AmMin, v72:401). Scale: See Image. © American Mineralogist