Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Comancheite: Hg13(Cl,Br)8O9
Comments: Small orange crystals of comancheite on matrix. Location: Mariposa mine, Terlingua, Terlingua district, Brewster County, Texas, USA. Scale: Picture size 1.4 mm. © Thomas Witzke / Abraxas-Verlag
Combeite: Na2Ca2Si3O9
Comments: Crystalline cleavage fragment of combeite. Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Compreignacite: K2(UO2)6O4(OH)6·8(H2O)
Comments: Yellow crystals of compreignacite on matrix. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Congolite: (Fe++,Mg,Mn)3B7O13Cl
Comments: Pearly crystalline grains of congolite. Location: Brazzaville, Pool, Congo. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Conichalcite: CaCu(AsO4)(OH) Willemite: Zn2SiO4
Comments: Conichalcite with willemite. Location: Collected from the 30 level of the Tsumeb mine. Tsumeb, Namibia. Scale: 2.1 x 1.5 cm. © John Veevaert
Conichalcite: CaCu(AsO4)(OH) Barahonaite-(Fe): (Ca,Cu,Na,Fe+++,Al )12Fe+++2(AsO4)8(OH,Cl)x·nH2O
Comments: Micro yellow, platy barahonaite-(Fe) crystals associated with green "beads" of conichalcite, yellowish, earthy arseniosiderite and micro olivenite crystals. Location: Dolores prospect near the village of Pastrana, in the Province of Murcia of southeastern Spain. Scale: Specimen Size 6 x 4 x 2 cm. © Tom Loomis / Dakota Matrix
Connellite: Cu19Cl4(SO4)(OH)32·3(H2O)
Comments: Blue acicular crystals of connellite. Location: Deep Creek Mountains, Tooele County, Utah, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Cookeite: LiAl4(Si3Al)O10(OH)8
Comments: Large tan-colored cookeite epimorph after a large 12 cm quartz crystal. The outer faces of the epimorph are overgrown with milky quartz crystals up to 15 mm long. Location: Bennett & Orchard Pit mines, Buckfield, Oxford Co., Maine, USA. Scale: 17x17x11 cm. © John Betts - Fine Minerals
Coombsite: K(Mn++,Fe++,Mg)13(Si,Al)18O42(OH)14
Comments: Sawed slab with brownish veining in pink (?) matrix. Location: Watson's Beach, Otago, South Island,, New Zealand. Scale: 3x2cm x 5mm. © Tom Loomis / Dakota Matrix
Cooperite: (Pt,Pd,Ni)S Osmium: (Os,Ir) Vasilite: (Pd,Cu)16(S,Te)7 Vysotskite: (Pd,Ni)S
Comments: BSE image taken with a SEM of the sulfide-dominant microparagenesis filling a gas vacuole. Cooperite crystal surrounded by Pd-Cu-Pt-S phase (vasilite?), vysotskite and osmium laths (white) in chalcopyrite-bornite matrix (dark). (CanMin 38:1258). Location: Pustaya River placer deposit, situated within the Koryak-Kamchatka platinum-bearing belt of Alaskan-type intrusions in eastern Russia. Scale: See Image. © Canadian Mineralogist