List of All Gemstone Names Starting With Letter 0″C”
- Cacoxenite
- Cairngorm
- Calcite
- California Ruby
- Californite
- Calsilica
- Campbellite
- Canary Diamond
- Canary Tourmaline
- Canasite
- Cancrinite
- Cape Emerald
- Cape May Diamond
- Cape Ruby
- Carbuncle
- Carnegieite
- Carnelian
- Carnelian Agate
- Carnelian Onyx
- Carrollite
- Cassiterite
- Cat’s Eye
- Cat’s Eye Aquamarine
- Cat’s Eye Emerald
- Cat’s Eye Moonstone
- Cat’s Eye Quartz
- Cat’s Eye Tourmaline
- Catapleiite
- Catseye
- Cavansite
- Cave Creek Jasper
- Celadonite
- Ceruleite
- Cerussite
- Cervantite
- Cesium Beryl
- Ceylon Sapphire
- Chabazite
- Chalcanthite
- Chalcedony
- Chalcocite
- Chalcopyrite
- Chalcosiderite
- Chambersite
- Chamosite
- Charlesite
- Charoite
- Chathan Emerald
- Cherry Opal
- Chevkinite-Ce
- Chiastolite
- Childrenite
- Chiquitanita
- Chkalovite
- Chlorastrolite
- Chlorite
- Chlorite-Group
- Chloromelanite
- Chondrodite
- Chrome Chalcedony
- Chrome Diopside
- Chrome Tourmaline
- Chrome-Chalcedony
- Chrome-Ciopside
- Chrome-Tremolite
- Chrome-Ttanzanite
- Chromian-Amesite
- Chromian-Enstatite
- Chromian-Titanite
- Chromite
- Chrysoberyl
- Chrysoberyl Cat’s Eye
- Chrysocolla
- Chrysolite
- Chrysomelanite
- Chrysopal
- Chrysoprase
- Chrysotile
- Cinn
- Cinnabar
- Citrine
- Citrine Topaz
- Claro Opal
- Clausthalite
- Cleavelandite
- Cleiophane
- Clinochlore
- Clinohumite
- Clinothulite
- Clinozoisite
- Cluorbritholite-Ce
- Cobaltite
- Cobaltocalcite
- Coffinite
- Colemanite
- Colombian Emerald
- Color-Change Garnet
- Color-Change Sapphire
- Colorado Jade
- Colorado Ruby
- Columbite-Fe
- Common Opal
- Condor Agate
- Congo Emerald
- Conichalcite
- Connellite
- Cookeite
- Copal
- Copper Ruby
- Coquimbite
- Cordierite (Iolite)
- Cornelian
- Cornetite
- Cornflower Blue Sapphire
- Cornish Diamond
- Coronadite
- Cortez Pearl
- Corundum
- Cosmic-Obsidian
- Covellite
- Crandallite
- Crazy Lace Agate
- Creedite
- Cristobalite
- Crocidolite
- Crocoite
- Cryolite
- Csarite
- Cubanite
- Cultured Pearl
- Cuprian Adamite
- Cuprian-Adamite
- Cuprite
- Cuproadamite
- Cuprosklodowskite
- Cyanite
- Cyanotrichite
- Cylindrite
- Cymophane
- Cymrite
- Cyprine
- Czochralski Alexandrite
