C
Cabalzarite
Cacoxenite
Cafarsite
Calcioancylite
Calcioferrite
Calcite
Caledonite
Callaghanite
Campylite (Mimetite)
Canavesite
Cancrinite
Carletonite
Carlhintzeite
Carminite
Carnotite
Carrolite
Cassiterite
Castellaroite
Catapleiite
Cavansite
Celadonite (Smectite Group)
Celestite
Ceruleite
Cerussite
Cervantite
Cetineite
Chabazite
Chabazite-(Na) (formerly called Herschelite)
Chalcanthite
Chalcoalumite
Chalcophanite
Chalcophyllite
Chalcopyrite
Chalcosiderite
Chalcosite
Chamosite
Chayesite
Chenevixite
Childrenite
Chlorite
Chrysocolla
Churchite-(Y)
Cinnaber
Claraite
Claudetite
Cleophane (Sphalerite)
Clinoclase
Clinoptilolite
Clinopyroxene
Clinozoisite
Cobaltaustinite
Cobaltkoritnigite
Cobaltocalcite
Conichalcite
Connellite
Cordierite
Cornetite
Cornubite
Cornwallite
Coronadite
Corundum
Covellite
Cowlesite
Crandallite
Creedite
Chrome-bearing Grossular (Garnet Supergroup)
Cristobalite
Crocoite
Cronstedtite
Cryptomelane
Cumengeite
Cuprite
Cuprian adamite
Cuprosklodowskite
Curite
Cyanotrichite
Cyrilovite