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CORAL.
Coral, ancient idea of its nature, 100.
-----much used by the Gauls, 101.
-----. artificially blanched, 103.
Corallis, red jasper, 146.
Coralachates, 7.
Corundum, 201.
Cosimo I., carves porphyry, 264.
-----and family, cameo, 294.
Cosmus, 227.
"Corinthian Brass," the, 155.
"Cotes," emery-stones, 190.
-----, Armenian, 191.
Creta, sealing, 163.
------matrix, 339·
Crystal, the Ethiopie, 104.
------used for vases, 105.
------for a burning-glass, no.
------in glass-making, 112.
------for false gems, 113.
------for statuettes, 115.
-----to soften, 355.
Cymophane, 38, 320. Cyanus, not the sapphire, 123.
------, a pigment, 125.
—, artificial, 277. Cymbia, gondoles, in Chrysoprase,
90. Cynthia's beryl, 51. Czemovitza opal mines, 241.
Dante, 134.
" David," gem of king, 337.
Dee, Dr., showstone of, 122.
" Devil's looking - glass," Kelly's,
209.
Diadochus, 122. Diamonds, parturition of, 12. Diana de Poitiers,
bracelets of, 74. Didius Julian cameo, 293. Doublets, 114, 334.
Dracontia, the diamond, 48. Dresden Sardonyx, the, 298. Duchanek, lapis
spiritalis, 252.
Earinus, pyxis of, 291. Egyptian pebble, 5.
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GOA-STONE.
" Egyptian-stone," basalt. 40. Egyptian mosaic, 328. Elizabeth, Queen, agate of, 10. Electrum, 310. Emery, 192.
------, where found, 195.
Emerald, root of, 265. Enamel, invention of, 358. Enhydros, 119. Essonite garnet, r 7. Etruscan jeweliy, 89.
------pastes, 327.
Eye-onyx, 321.
------, singular adaptation of, 322.
Farnese tazza, 225.
Felspar, 127.
Firmus, Indian trader, 228.
------, glass palace of, 337.
Florentine pietra-dura mosaic, 151. Foils, how made, 159. Fortuna Seia, 25.
Galen on the virtue of the green
jasper, 149. " Garnet," derivation of, 14.
------, Siriam, 16.
------, engraved, 18.
------, vases of, 19.
Gem-engraving, origin of, 195.
------of the Aztecs, 198.
------of the Jews, 201.
Gems found in animals, 4;.
------, whence obtained by the
early Greeks, 234. German onyx, how stained, 232. Girasol, semi-opal, 244. Glass, malleable, 351.
------, to engrave, 354.
------, British, 349.
------first noticed, 325.
-----antique vases, 332.
------medallions, 335.
----- coin, 349,
------, Venetian, fabric of, 350.
Goa-stone, 256.
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