Clement VI, 389 Clement VII, 342, 378 Clerc, Dr. G. O., vii Cock, the, on amulets, 137 Cologne, chrysolites in cathedral of, 66 Color, Christian symbolism of, 273, 274 of gems and vestments for each day of the week in Siam, 335 symbolism of, 29-33 therapeutic effect of, 27-29, 33, 370 Confucius and musical jade, 87 Consecration of precious stones, 44, 45 Constantine, King of Greece, star-sapphire in sword-hilt of, 334 Constantine the Great, 136, 286, 373 Constellations, symbols of, in engraved gems, 352-355 Coral, 40, 68, 69, 236, 237, 238, 242, 243, 244, 245, 246 gem of Venus, 348 red, superstition in regard to, explained, 160, 161 therapeutic effect of, 372 Cornelius à Lapide (Van den Steen), 280 Corundum, 39, 252, 344, 372 Council of Laodicea, canon on amulets, 42 Countries, gem of, 363, 364 Crocidolite (Krokidolite), 360 Cronstedt, Axel Frederic, 271 Crookes, Sir William, 172 Cross, monogrammatic, 136 of Christ, found by St. Helena, 286 Crusades, 66 _Crux ansata_, 135 Crystal ball, called “Currahmore Crystal,” 223 from Madagascar, 217 in Grüne Gewölbe, Dresden, 223 in sepulchres, 219-222 Japanese, 217, 218 of Childeric, 219-221 Crystal gazing, 176-224 Ctesiphon, sack of, 284, 285 “Currahmore Crystal,” 223 Cyanite, 49 _Cyanus_, 119 Cylinders, Assyro-Babylonian, 121-123, 204 “Cyrianides,” Greek treatise on stones, 16 D Damigeron, 15, 90, 104, 132, 140, 141 Damour, A., vii Dan, 289, 297 Days of the week, ritual gems worn in occult ceremony, 336 gems of the, 332, 333 Dee, Dr. John, 189-196 Delhi, 79 Demantoid, 49 Dendrite, 360 Diamond, 10, 28, 32, 69-76, 234, 236, 239, 240, 241, 242, 243, 269, 280, 281, 294, 344, 348, 375 as natal stone, 308, 320 breeding, 41, 72 combustion of, 71 “Diamond Throne,” 238 _elmêshu_ in Assyrian (?), 231 gem of reconciliation, 70 of the Sun, 349 of Winter, 323, 326, 327 in breastplate, 276 medicinal use of, 153 names of Hindu castes given to, 71, 73 paleness sign of infidelity, 157 Sanskrit names of, 343 secured by birds, 75, 176 symbolism of, 235 talismanic effect of various shapes of, 154 Talmudic legend of, 74 therapeutic effect of, 386-389 used as poison, Bejazet II, Paracelsus, Cellini, Sir Thomas Overbury, 154-156 “Diamond Throne,” 238 Diana and Amethyst, 59 Diaspore, 47 Didius Julianus, Emperor, 178 Diodorus, Bishop of Tyre, 16 Diodorus Siculus, 66, 298 Dionysius Periegetes, 298 Dioptase, gem of the Congo, 363 Dioskorides, Greek gem-engraver, 342 Disease in precious stones, 5 Dolce, Ludovico, 18 Domitian, 341 _Donnerkeil_, 162 Draper, Mrs. Henry, vii Dreams, books of, ancient, 356, 357 meaning of precious stones seen in, 356-358 E Ebers Papyrus, 367, 368, 388 _Echites_, 34 Edda, 146