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Chromphyllite: (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2
Comments: Small grains of blue-green chromphyllite. Location: Slyudyanka, Southern Lake Baikal, Russia. Scale: Peg Size 1 cm. © Sergey Vasiliev / Systematic Mineralogy
Chrysoberyl: BeAl2O4
Comments: Chrysoberyl (Alexandrite) crystal on matrix with excellent color change (Daylight, Tungsten Bulb). Location: Malyshevo, Yekaterina Oblast', Urals, Russia. Scale: Crystal size 1.2 cm. © Kevin Ward
Comments: Chrysoberyl (alexandrite) sixling twin crystal. Location: Zimbabwe. Scale: Crystal size 2.3 cm. © Richard Dale / Dale Minerals
Chrysocolla: (Cu,Al)2H2Si2O5(OH)4·n(H2O)
Comments: Botryoidal chrysocolla lining a vug. Location: Inca del Oro, Copiapó, Chile. Scale: 7.5 x 6 cm. © Fabre Minerals
Chrysocolla: (Cu,Al)2H2Si2O5(OH)4·n(H2O) Tenorite: CuO
Comments: Lustrous black botryoidal Tenorite mostly covering a sky-blue massive chrysocolla matrix. Location: 79 mine, Banner district, Pinal Co., Arizona. Scale: 5.5 x 3 cm. © Dan Weinrich
Chrysotile: Mg3Si2O5(OH)4
Comments: Polished slab of chrysotile asbestos minerals showing the fibrous, chatoyant crystal patterns. Location: Globe, Globe-Miami District, Gila Co., Arizona, USA. Scale: 8x7x1 cm. © John Betts - Fine Minerals
Chukanovite: Fe2(CO3)(OH)2
Comments: Left - acicular to fibrous individuals of chukanovite. Right - spherulites of chukanovite up to 1 mm (Eur. J. Mineral, v19:891). Location: Found in cavities of weathered fragments of the Dronino ataxite iron eteorite found near the Dronino village, Kasimov district, Ryazan’ Oblast, Russia. Scale: See Images. © Eur. J. Mineral
Chukhrovite-(Nd): Ca3(Nd,Y)Al2(SO4)F13·12(H2O)
Comments: SEM image of chukhrovite-(Nd) crystals. (New Data on Minerals. M., 2005. Vol. 40). Location: Oxidized zone of the Kara-Oba deposit (Central Kazakhstan). Scale: Scale bar 10µm. © New Data on Minerals
Chukhrovite-(Y): Ca3(Y,Ce)Al2(SO4)F13·10(H2O)
Comments: White crystalline crust of chukhrovite-(Y) on matrix. Location: Kara-Oba deposit, Betpakdala Desert, Central Kazakhstan. Scale: Not Given. © Diederik Visser
Churchite-(Y): YPO4·2(H2O)
Comments: Acicular, radiating crystals of churchite-(Y). Location: Leoni mine, Auerbach, Bavaria, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals