C
Cabalzarite
Cacoxenite
Cafarsite
Calcioancylite
Calcioaravaipaite
Calcioferrite
Calciostrontianite
Calcite
Calderonite
Caledonite
Callaghanite
Camerolaite
Campylite (Mimetite)
Canavesite
Cancrinite
Cannizzarite
Capranicaite
Carletonite
Carlhintzeite
Carminite
Carnotite
Carrolite
Cassiterite
Castellaroite
Catapleiite
Cavansite
Celadonite (Smectite Group)
Celestite
Ceruleite
Cerussite
Cervantite
Cetineite
Chabazite
Chabazite-(Na) (formerly called Herschelite)
Chalcanthite
Chalcedony
Chalcoalumite
Chalcophanite
Chalcophyllite
Chalcopyrite
Chalcosiderite
Chalcosiderite-turquoise series
Chalcosite
Challacolloite
Chamosite
Chayesite
Chenevixite
Chevkinite-(Ce)
Chiavennite
Childrenite
Chlorargyrite
Chrome-bearing Grossular (Garnet Supergroup)
Chromium-bearing clinochlore
Chlorite
Chloroxiphite
Chondrodite
Chrysocolla
Churchite-(Y)
Cinnabarite
Claraite
Claudetite
Cleophane (Sphalerite)
Clinoatacamite
Clinochlore
Clinoclase
Clinoferrisilite
Clinoptilolite
Clinoptilolite-(Ca)
Clinopyroxene
Clinozoisite
Cobaltaustinite
Cobaltkoritnigite
Cobaltlotharmayerite
Cobaltocalcite
Cobaltomenite
Conichalcite
Connellite
Copiapite
Cordierite
Corkite
Cornetite
Cornubite
Cornwallite
Coronadite
Corundum
Cosalite
Covellite
Cowlesite
Crandallite Group
Creaseyite
Creedite
Cristobalite
Crocoite
Cronstedtite
Crossite
Cryptomelane
Cumengeite
Cuprite
Cuprian adamite
Cuprodongchuanite
Cuprosklodowskite
Curite
Cyanotrichite
Cyrilovite