_Ceraunia_, 82 Ceylon, temple treasure in, 298, 299 Chalcedony, 30, 31, 123, 131, 287, 291, 296, 301, 303, 361 Chalchihuitl, 304, 305, 307, 348 Charlemagne, Emperor, 189, 255, 288, 290 talisman of, 329–331 Charles V, Emperor, 294, 306 Charles V of France, 177 Charles IX of France, 294 Charles the Bald, 288 Charm in old Italian MS., 327, 328 _Chelidonius_, or “swallow-stone,” 119, 172 _Chelonia_, 170, 171, 198 Cheops, mummy of, decorated with precious stones, 279 _Chesbet_, Egyptian name of lapis lazuli, 149 Chicken Itzá, Sacred Well of, 307, 308 Chinkstone (phonolite), 2 Chladni, 95, 104 Chlorophane, 237 Christ, head of, engraved on emerald, 291, 292 Christian II of Denmark, his magic pebble, 21 Christian IV of Denmark, 140 Christopher, St., 258, 259 Christy collection, 309 Christy, David, 218 _Chrysocolla_, 53 Chrysolite (peridot), 287, 291 a sacred stone, 379 in Shakespeare’s Othello, 379 Chrysoprase, 123, 277, 287 _Cinædias_, 169 Claudian’s epigrams on rock-crystal, 32 Claui, St., 252 Clemens, St., 252 Clement VII, Pope, 387 Clerc, G. O., vii Clotaire II, 262 Cochrane, Capt. Charles Stuart, 312 Coligny, Gaspard de, 207 Color, harmony of, between gowns and jewels, 407 Columba, St., and white pebbles, legend of, 24, 25, 156 Conrad III, King of the Germans, 290 Constantine the Great, 329 Constantine XII, of Greece, star-sapphire in sword of, 372–373 Coral, 30, 119, 120, 121, 123, 124, 126, 298, 301, 304, 341, 371 amulets of, in Spain, 368 Crispi’s amulet of, 339 curative use of, 131–133 greatly favored in Tibet, 343 in Benin, Africa, 379 ominous change of hue, 132, 133 selected for Dalai Lama’s incense vessel, 303 “tincture of,” 132 worn by Queen Helena of Italy, 380 _Cornu ammonis_, 197 Cortés, Hernan, 305, 307 Corundum, 133 varieties of, 396 “Crab’s eye,” 167 “Crabstone,” 121, 122 Crantz, David, 359 _Crapaudine_, or “toad-stone,” 164, 165 Crescentius, St., 252 Crispi, Francesco, 339 Crispin and Crispian, SS., 259, 273 Cross, jewelled, of Duke of Brunswick, 289 of Zaccaria, 290, 291 “Crown of the Virgin,” 287 Crystal, magic, of a Fijian, 364–366 Crystal balls as curative amulets, 25 Culin, Stewart, 358 Curative “crystals” of Australian medicine-men, 16 of Kainugá Indians of Paraguay, 18 of New Guinea medicine-men, 19 Curative use of gems, 118–159 for “Black Death” plague, 120 Francesco India’s opinion of, 124, 125 in Bohemia, 121 in Denmark, 126 in Leyden, 126, 127 of particular stones, 129–159 prices of stones, 123 Robert Boyle on, 125, 126 Cushing, Lieut. F. H., 310, 358 _Custodia_, or monstrance, examples of, in Spain, 294, 295 Cuthbert, St., 273 well of, 265 Cybele, image of, a meteorite, 74, 75 Cyprianus, St., 252, 253 Cyriacus, St., 252 D _Dagoba_, jewelled Buddhist reliquary, 300 Damigeron, 129