C

Cabalzarite

Cacoxenite

Cafarsite

Calaverite

Calcioancylite

Calcioaravaipaite

Calcioferrite

Calciostrontianite

Calcite

Calderonite

Caledonite

Callaghanite

Camerolaite

Campylite (Mimetite)

Canavesite

Cancrinite

Cannizzarite

Capranicaite

Carletonite

Carlhintzeite

Carminite

Carnotite

Carrolite

Caryopilite

Cassiterite

Castellaroite

Catapleiite

Cavansite

Celadonite (Smectite Group)

Celestite

Cerianite-(Ce)

Ceruleite

Cerussite

Cervantite

Cetineite

Chabazite

Chabazite-Ca

Chabazite-Na (formerly called Herschelite)

Chalcanthite

Chalcedony

Chalcoalumite

Chalcophanite

Chalcophyllite

Chalcopyrite

Chalcosiderite

Chalcosiderite-turquoise series

Chalcosite

Challacolloite

Chambersite

Chamosite

Chayesite

Chemigite

Chenevixite

Chevkinite-(Ce)

Chiavennite

Childrenite

Chlorargyrite

Chrome-bearing Grossular (Garnet Group)

Chromium-bearing clinochlore

Chlorite

Chloroxiphite

Chondrodite

Chrysocolla

Churchite-(Y)

Cinnabarite

Claraite

Claudetite

Cleophane (Sphalerite)

Clinoatacamite

Clinobisvanite

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

Cualstibite-1M

Cumengeite

Cuprian adamite

Cuprite

Cuprite, var. Chalcotrichite

Cuproaustinite

Cuprodongchuanite

Cuprosklodowskite

Curite

Cyanotrichite

Cyrilovite