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Caminite: Mg7(SO4)5(OH)4·(H2O)
Comments: White crystalline massive caminite. Location: Nepian Deposit, East Siberian Salt Basin, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Campigliaite: Cu4Mn(SO4)2(OH)6·4(H2O)
Comments: Sparse pale blue coatings of campigliaite on matrix. Location: Richfield, Sevier County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Canasite: (Na,K)6Ca5Si12O30(OH,F)4
Comments: Yellow translucent canasite grain with nepheline. Location: Kirovskii Mine, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Canavesite: Mg2(CO3)(HBO3)·5(H2O)
Comments: White acicular crystals of canavesite on matrix. Location: Brosso Mine, Ivrea, Piedmont, Italy. Scale: Picture size 9 mm. © Thomas Witzke / Abraxas-Verlag
Cancrinite: Na6Ca2Al6Si6O24(CO3)2
Comments: Milky white, translucent fan-shaped sprays of cancrinite crystals. Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Cancrisilite: Na7Al5Si7O24(C03)·3(H2O)
Comments: Light pink crystalline cancrisilite. Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Canfieldite: Ag8SnS6
Comments: Dull, black pseudo-octahedral crystals of canfieldite. Location: Gallofa vein, Colquechaca, Chayanta, Potosi, Bolivia. Scale: Crystal size 2 cm. © Dave Barthelmy
Cannizzarite: Pb4Bi6S13
Comments: Very delicate 2 mm. crystals of dark gray cannizzarite on matrix. Location: Kudryaviy Volcano, Iturup Island, Kurilian Island Chain, Russia. Scale: 3.8x3x2.4 cm. © Richard Dale / Dale Minerals
Cannonite: Bi2O(OH)2SO4 Bismuthinite: Bi2S3
Comments: Opaque white crystal tufts of cannonite on quartz crystals with dark, metallic bismuthinite. Location: Marysvale, Piute County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Caoxite: Ca(C2O4)·3(H2O)
Comments: Colorless to white crystals of caoxite on matrix. Location: Cerchiara Mine, Faggiona, Vara valley, La Spezia province, Liguria, Italy. Scale: Picture size 1.2 mm. © Thomas Witzke / Abraxas-Verlag
Capgaronnite: HgAg(Cl,Br,I)S
Comments: Very small black prismatic crystals of capgaronnite in matrix. Location: Cap Garonne, Var, France. Scale: Picture size 0.7 mm. © Thomas Witzke / Abraxas-Verlag
Caracolite: Na3Pb2(SO4)3Cl
Comments: Nearly transparent colorless thin crystalline crust of caracolite. Location: Iquique, Tarapaca, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
Carboborite: Ca2Mg(CO3)2B2(OH)8·4(H2O)
Comments: Pure crystalline cleavage fragment of carboborite. Location: Inlamartit, Turkey. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Carbocernaite: (Ca,Na)(Sr,Ce,Ba)(CO3)2
Comments: Light brownish massive carbocernaite. Location: Olenii (Oleny) Ruchei Stream apatite deposit, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Carbokentbrooksite: (Na,[ ])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O
Comments: Orange carbokentbrooksite crystals in matrix. Location: Dara-i-Pioz Glacier, Altai Range, Tajikistan. Scale: Specimen size: 31x25x20 mm. © Sergey Vasiliev / Systematic Mineralogy
Carbonate-fluorapatite: Ca5(PO4,CO3)3F Apatite: Ca5(PO4)3(OH,F,Cl)
Comments: Pink, colliform carbonate-fluorapatite on matrix. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Carbonate-hydroxylapatite: Ca5(PO4,CO3)3(OH) Robertsite: Ca6Mn+++9(PO4)9O6(H2O)6·3(H2O) Apatite: Ca5(PO4)3(OH,F,Cl)
Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Carbonatecyanotrichite: Cu++4Al2(CO3,SO4)(OH)12·2(H2O)
Comments: Bright blue micro crystals of carbonate-cyanotrichite on matrix. Location: Widowmaker mine, Fry Canyon, San Juan Co., Utah, USA. Scale: Crystal size 0.1 mm. © Tom Loomis / Dakota Matrix
Caresite: Fe++4Al2(OH)12CO3·3(H2O)
Comments: Tabular brownish-yellow crystals of caresite in matrix. Location: Poudrette quarry, Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 2.5 mm. © Thomas Witzke / Abraxas-Verlag