Mineral Specimen Images (C)

Coquimbite: Fe+++2(SO4)3·9(H2O)  
Goldichite: KFe+++(SO4)2·4(H2O)  
Ferricopiapite: Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)

Comments: Prismatic to fibrous crystals of goldichite on white massive coquimbite with yellow ferricopiapite.
Location: Dexter No. 7 Mine, Calf Mesa, San Rafael Swell, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Coquimbite: Fe+++2(SO4)3·9(H2O)

Comments: Coquimbite rosettes (small bumps) secondarily nucleated on a cryptocrystalline mass. AmMin, v90, p1734.
Location: Vents associated with underground coal fires in the Wuda coal bed of Inner Mongolia. Scale: See Image.
© American Mineralogist

Corderoite: Hg3S2Cl2

Comments: Small dark brown dodecahedral crystal of corderoite.
Location: Hohe Buche, Königsberg, Wolfstein, Palatinate, Rhineland-Palatinate, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Corderoite: Hg3S2Cl2  
Radtkeite: Hg3S2ClI

Comments: SEM image of prismatic radtkeite crystals and equant corderoite crystals on quartz matrix. AmMin, v76:1715).
Location: McDermitt mercury mine, Humboldt County, Nevada, USA. Scale: Scale Bar 10 µm.
© American Mineralogist

Cordierite: Mg2Al4Si5O18

Comments: Brown rectangular cordierite crystals in matrix. These crystals are not gemmy enough to be called iolite.
Location: Richmond Soapstone Quarry, Richmond, Cheshire Co., New Hampshire, USA. Scale: 24x20x15 mm.
© John Betts - Fine Minerals

Cordierite: Mg2Al4Si5O18

Comments: Piece of near-gem-quality glassy gray-blue cordierite with some yellowish internal reflections.
Location: Mt. Bity District, Madagascar. Scale: Overall: 2 x 1 x 1.5 cm.
© Tom Loomis / Dakota Matrix

Cordylite-(Ce): Ba(Ce,La)2(CO3)3F2  
Synchysite-(Ce): CaCe(CO3)2F

Comments: Yellow crystals of cordylite-(Ce) on light brownish synchysite-(Ce).
Location: Narssârssuk (Narsarsuk), Igaliko, Greenland. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Corkite: PbFe+++3(PO4)(SO4)(OH)6  
Hinsdalite: (Pb,Sr)Al3(PO4)(SO4)(OH)6

Comments: Small brown rounded translucent crystals of corkite on darker brown botryoidal hinsdalite.
Location: Grube Schone Aussicht, near Dernbach, Montabaur, Rheinland-Pflaz, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cornetite: Cu3(PO4)(OH)3

Comments: Crystals of cornetite on matrix.
Location: Etoile Mine, Katanga Province, Dem. Rep. of Congo. Scale: Crystal size 0.5 cm.
© John Veevaert

Cornetite: Cu3(PO4)(OH)3

Comments: Radial groups of intense blue cornetite crystals in green malachite.
Location: Mine de l'Etoile, Shaba, Lubumbashi Zaire. Scale: Picture size 5 cm.
© Fabre Minerals

Cornubite: Cu5(AsO4)2(OH)4  
Conichalcite: CaCu(AsO4)(OH)

Comments: Blue green crystalline cornubite alteration of enargite with green conichalcite in white calcite.
Location: Lime Bluff Quarry, Lycoming County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cornwallite: Cu5(AsO4)2(OH)4

Comments: Emerald green botryoidal crystals of cornwallite.
Location: Tintic District, Juab County, Utah, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Coronadite: Pb(Mn++++,Mn++)8O16  
Crocoite: PbCrO4

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

Coronadite: Pb(Mn++++,Mn++)8O16  
Iodargyrite: AgI

Comments: Dark, fine-grained massive coronadite with yellowish octahedral iodargyrite crystals.
Location: Broken Hill, New South Wales, Australia. Scale: Picture size 3x2 cm.
© Dave Barthelmy

Corrensite: (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O)

Comments: Platy, authigenic chloritic mixed-layer clays (Corrensite?), lining the pore spaces of a sandstone. SEM image from a core sample.
Location: Unknown. Scale: Picture size 33 µ-m.
© OMNI Laboratories, Inc

Corrensite: (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O)

Comments: White earthy crust of corrensite on matrix.
Location: Bolet, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Corundum: Al2O3

Comments: corundum (variety Sapphire).
Location: Miass, Urals, Russia. Scale: 10 x 8 cm.
© Fabre Minerals

Corundum: Al2O3  
Zincohogbomite-2N2S: (Zn,Fe++)(2-2x)(Ti)xAl4O8

Comments: Thin-Section (Plane Polarized Light) of a brown, twinned zincohögbomite-2N2S crystal with blue corundum.
Location: Mikro-Lakka Emery deposit, Kerketeas Mt, Sámos Island, Aegean Islands Department, Greece. Scale: Picture size 1.1 mm.
© Thomas Witzke / Abraxas-Verlag

Corundum: Al2O3

Comments: Bright red ruby corundum crystals in white marble matrix.
Location: Jagdalak (Jagdalek; Jagdalik) Ruby Mine, Sorobi District, Konar (Kunar; Konarh; Konarha; Nuristan) Province, Afghanistan. Scale: 4x3.5x3 cm.
© John Betts - Fine Minerals

Corvusite: (Na,Ca,K)V8O20·4(H2O)

Comments: Silky to dull brown corvusite in/on sandstone.
Location: Fire Fly Mine, near Delta, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species