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Cylindrite: Pb3Sn4FeSb2S14
Comments: Cylindrical crystals of cylindrite in granular tin sulfide ore. Location: Montserrat Mine, Poopo, Oruro, Bolivia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cymrite: BaAl2Si2O8·(H2O)
Comments: Pearly white cymrite with jadeite in greywacke rock. Location: Pacheco Pass, Santa Clara County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cyrilovite: NaFe+++3(PO4)2(OH)4·2(H2O)
Comments: Greenish-yellow crystals of cyrilovite in matrix. Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag