C Calcite 12, 16, 37, 49, 61, 62, 63, 65, 66, 68, 74 Calcium carbonate 12, 16, 37, 67 Callaway County 26, 27 Cannel Coal 51 Carnelian 42 Carnotite 65 Carter County 58 Carthage marble 15 Cave deposits 16 Chalcedony 37, 68 Chats 35, 43, 60 Chert 14, 34, 37, 42, 59, 62, 66, 71, 73 Clinton 33 Coal 20, 49, 53, 63, 73 Cole County 62 Conchoidal fracture 26, 34, 51 Concretion 66, 68 Conglomerate 54 Copper 40, 66 Cotton rock 15 Crawford County 27 Crinoids 12 Cross-bedding 30, 31 Crystal City 33, 41 D Definition, rock and mineral 5, 73, 74 Developing mineral deposit 24, 59 Diabase 44, 48, 49, 73 Diamonds 40, 65 Diaspore clay 27, 58, 66, 73 Dike 46, 47, 48 Dolomite 10, 11, 18, 59, 60, 73, 74 Dolomite chemical composition 12, 20 Double refraction 18 Drusy quartz 42 E Effervescence 10, 11, 16, 17, 18, 19 Elephant Rocks 39, 41