Mineral Specimen Images (C)

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

Comments: White translucent crystalline cryolithionite in brown cryolite.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

Cummingtonite: [ ]Mg7Si8O22(OH)2

Comments: Light brown prismatic crystalline aggregate of cummingtonite with radiating structure.
Location: West Chesterfield, Hampshire County, Massachusetts, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuprite: Cu2O

Comments: Dark red ball or sphere of cuprite crystals set on a pearly white dolomite crystal matrix.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 5 x 2.5 x 4 cm.
© Dan Weinrich

Cuprite: Cu2O  
Chrysocolla: (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Comments: Semi-metallic, dark reddish gray, cuprite crystals on blue chrysocolla.
Location: Mashamba West mine, Shaba, Congo. Scale: 7.5 x 4.7 x 2.3 cm.
© Fabre Minerals

Cuprite: Cu2O

Comments: Red, acicular chalcotrichite crystals as a fine, fibrous red mass on matrix.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Cuprobismutite: Cu10Bi12S23  
Kupcikite: Cu3.4Fe0.6Bi5S10

Comments: Backscattered electron image of kupcíkite (ku) replacing cuprobismutite (cu); both phases are in turn replaced by bsimuthinite derivative (bd79-92).
Location: Felbertal, Austria. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

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

Cuproiridsite: CuIr2S4  
Isoferroplatinum: (Pt,Pd)3(Fe,Cu)

Comments: Gray equant crystal of cuproiridsite in light gray isoferroplatinum. Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.14 mm.
© Thomas Witzke / Abraxas-Verlag

Cupromakovickyite: Cu4AgPb2Bi9S18  
Hodrushite: Cu8Bi12S22

Comments: Kup?cíkite (ku) and hodrushite (ho) partly replaced by bismuthinite derivative (bd56) with relict lamellae of low-Cu (4P) and cupromakovickyite [4P(Cu,Pb)]. (CanMin, 41:1165).
Location: Scheelite deposit of Felbertal, Austria. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Cupromakovickyite: Cu4AgPb2Bi9S18  
Makovickyite: Ag1.5Bi5.5S9

Comments: SEM polished section detail of a grain of cupromakovickyite (dark gray) with locally exsolved lamellae (bright gray) of makovickyite. (CanMin, 46:503).
Location: Baita Bihor, Romania.. Scale: See Image.
© Canadian Mineralogist

Cupropavonite: AgPbCu2Bi5S10

Comments: BSE image of pavonite matrix (light gray) showing thin exsolution lamellea of cupropavonite (darker gray, C). (Axis, Volume 2, Number 4 (2006)).
Location: Lucky Lucy mine, Darwin mining district, Inyo County, California, USA. Scale: Gail E. Dunning / Mineralogical Record.
© Mineralogical Record

Cupropearceite: [Cu6As2S7][Ag9CuS4]

Comments: Crystal of cupropearceite.
Location: Sarbay Mine, near city of Rudnyi, Kostanai Oblast', Kazakhstan. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Cuprorhodsite: CuRh2S4

Comments: Grain UK296A-1, erlichmanite (1), Ru-rich erlichmanite (2), cuproiridsite (3), and cuprorhodsite (4). (CanMin, v40:1127).
Location: Uktus chromitites complexes in the northern and central Urals, Russia. Scale: See Image.
© Canadian Mineralogist