Chapter C

cabochon gems: 10-12
Caddo Lake: 25
carbuncle: 22
carnelian: 27
cassiterite: 23, 29
celestite: 19, 35
chalcedony: 27
geodes: 26
chuck: 15, 17
citrine: 25-26
cleavage: 6, 13
coal: 22
Coke County: 19
color: 5
Colorado River: 25
Concho River: 25
crown girdle facets: 16, 17
crown of gemstone: 15, 16
crystals: 7-9
crystal systems: 7
crytolite: 21
Culberson County: 22, 23, 25, 26, 31
culet: 13
cutting and polishing: 10-17
cutting lap: 13