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Crocoite: PbCrO4 Vauquelinite: Pb2Cu(CrO4)(PO4)(OH)
Comments: Olive-greenish vauquelinite encrusting red crocoite. Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 6 mm. © Thomas Witzke / Abraxas-Verlag
Crocoite: PbCrO4 Coronadite: Pb(Mn++++,Mn++)8O16
Comments: Black coronadite with red crocoite on matrix. Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Specimen size 7 cm. © Thomas Witzke / Abraxas-Verlag
Cronstedtite: Fe++2Fe+++(SiFe+++)O5(OH)4
Comments: Pyramidal crystals of cronstedtite. Location: Santa Eulalia, Chihuahua, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Cronusite: Ca0.2(H2O)2CrS2
Comments: Light gray grain of cronusite. Polished section (from microprobe analysis) in reflected light. Location: Enstatite meteorite, Norton Co., Kansas, USA. Scale: Picture size 0.18 mm. © Thomas Witzke / Abraxas-Verlag
Crookesite: Cu7(Tl,Ag)Se4 Eucairite: CuAgSe
Comments: Polished section (PPL) showing zoned crystal of cream-colored eucairite and pale lavender crookesite along with steel blue umangite and white clausthalite in dark gray gangue.. Location: Mine dump (tailings) of Shaft 371 near Hartenstein/Saxony, Germany. Scale: Picture size 5 mm. © Thomas Schlothauer
Crossite: Na2(Mg,Fe++)3(Al,Fe+++)2Si8O22(OH)2
Comments: Black prismatic crystal clusters of crossite. Location: near Valley Ford, Sonoma County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Long metallic, black, prismatic crystals or crossite on matrix. Location: Webbing, Lammertal, Salzburg, Austria. Scale: Picture size 2.5 mm. © Tom Loomis / Dakota Matrix
Cryolite: Na3AlF6 Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)
Comments: Massive cryolite with solution cavities lined with octahedral ralstonite crystals. Location: Ivigtut, Greenland. Scale: Picture size 0.5 cm. © John Veevaert
Cryolite: Na3AlF6 Thomsenolite: NaCaAlF6·(H2O)
Comments: Massive, white cryolite with solution cavities lined with prismatic Thomsenolite crystals. Location: Ivigtut, Greenland. Scale: . © John Veevaert
Cryolite: Na3AlF6
Comments: Massive cryolite with one section of lustrous crystal faces. Location: Ivigtut, Greenland. Scale: Picture size 4 cm. © John Veevaert
Cryolite: Na3AlF6 Cryolithionite: Na3Li3Al2F12
Comments: White translucent crystalline cryolithionite in brown cryolite. Location: Ivigtut, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Red-brown crystalline massive cryolite. Location: Katugin River, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cryolite: Na3AlF6 Weberite: Na2MgAlF7
Comments: Gray weberite masses in white cryolite. Location: Ivigtut, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cryolithionite: Na3Li3Al2F12 Cryolite: Na3AlF6
Cryptohalite: (NH4)2SiF6
Comments: White to colorless crystals of cryptohalite. The red color is due to admixtured (amorphous ?) selenium. Location: Kladno, Stredoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Cryptohalite: (NH4)2SiF6 Bararite: (NH4)2SiF6
Comments: White crystalline bararite intermixed with cryptohalite colored yellow by selenium. Location: Shamokin, Northumberland County, Pennsylvani, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cryptomelane: K(Mn++++,Mn++)8O16 Adamite: Zn2(AsO4)(OH)
Comments: Black, rounded balls of cryptomelane and purple, transparent adamite. Location: Ojuela mine, Mapimi, Druango, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Cubanite: CuFe2S3
Comments: Brassy, lustrous, cyclic-twinned cubanite on matrix. Location: Henderson # 2 Mine, Chibougamau, Quebec, Canada. Scale: 10x6 mm. © Tom Loomis / Dakota Matrix
Cubanite: CuFe2S3 Plumbopalladinite: Pd3Pb2 Valleriite: 4(Fe,Cu)S·3(Mg,Al)(OH)2 Pentlandite: (Fe,Ni)9S8
Comments: Polished Section image (PPL) of plumbopalladinite (Pl) with polarite Po), surrounded by a rim of isoferroplatinum (Iso) with cubanite (Cu), pentlandite (Pe), and valleriite (Va). Location: Majak Mine, Talnakh, Norilsk, Ural, Russia. Scale: Picture Size 0.7 mm. © Thomas Witzke
Cumengite: Cu20Pb21Cl42(OH)40·6H2O Boleite: KPb26Ag9Cu24Cl62(OH)48
Comments: Inky blue cumengite "sixling" epitaxially overgrown on boleite. Location: Amelia mine, Santa Rosalia, Baja California Sur, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals