Stones/Gems with C
A real mineral; often means rock crystal (quartz)
A quartz variety used as a gemstone
A real rock; counts as a stone, though not a gem
Real mineral/stone; widely known and natural
Organic gem material; widely used in jewelry
A real gemstone, a type of chalcedony
Real mineral (celestite); sometimes gemmy
- Crimson
 - clear quartz
 - cut diamond
 - corundum
 - Celestite
 - Cats eye
 - cat
 - Cut diamonds
 - cement
 - Crack
 - chalk
 - callais
 - Cordierite
 - Canary diamond
 - Charlie Watts
 - Chalcedony
 - Cerussite
 - Carmine
 - cuarzo
 - Cyanite
 - Cobble
 - Chrystal
 - cubic zarconia
 - Cole
 - Cyrstal
 - cubic zircona
 - Cold
 - cinnabar
 - Catseye
 - Casper
 - car
 - cyan
 - Cat's eye
 - cat eye
 
Slová v zozname Stones/Gems with C pochádzajú od hráčov slovnej hry Meno, Mesto, Zviera, Vec.