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

Chalcedony

Chalcoalumite

Chalcophanite

Chalcophyllite

Chalcopyrite

Chalcosiderite

Chalcosite

Chamosite

Chayesite

Chenevixite

Chiavennite

Childrenite

Chromium-bearing clinochlore

Chlorite

Chrysocolla

Churchite-(Y)

Cinnaber

Claraite

Claudetite

Cleophane (Sphalerite)

Clinochlore

Clinoclase

Clinoptilolite

Clinopyroxene

Clinozoisite

Cobaltaustinite

Cobaltkoritnigite

Cobaltocalcite

Conichalcite

Connellite

Cordierite

Corkite

Cornetite

Cornubite

Cornwallite

Coronadite

Corundum

Covellite

Cowlesite

Crandallite  Group

Creedite

Chrome-bearing Grossular (Garnet Supergroup)

Cristobalite

Crocoite

Cronstedtite

Cryptomelane

Cumengeite

Cuprite

Cuprian adamite

Cuprosklodowskite

Curite

Cyanotrichite

Cyrilovite