INDEX 



619 



Carbonate = carbonado 

 Carbonetto coral, 603 

 Carborundum, 82 

 Carbuncle, 265, 348, 352, 356 

 Carbunculus alabandicus, 352 

 Carinthia, 372, 388 

 Carmoizing, 89, 242 

 Carnelian, 508 



agate, 512 



de la vieille roche, 508 



onyx, 512 



white, 5o5, 508 



Cascalho, 162 

 Cat-sapphire, 283 

 Cat's-eye, 302, 491 



alexandrite-, 305 



Ceylonese, 302 



chrysoberyl-, 302 



Hungarian, 493 



occidental, 491 



oriental, 302 



quartz-, 491 



ruby-, 266, 284 



sapphire-, 284 



topaz-, 284, 294 



Celestial opal, 374 



Celluloid, 551 



Cement-stick, 80 



Central Asian nephrite, 463 



Ceragate, 506 



Cerkonier, 342 



Ceylon, 277, 287, 293, 298, 299, 

 304, 305, 323, 339, 343. 351, 

 353, 372, 407, 409, 430, 484, 

 488, 492, 531, 595 



Ceylonese cat's-eye, 302 



chrysolite (tourmaline), 



372 

 opal (moon-stone), 429 



peridot (tourm.aline), 372 



ruby (garnet), 354 



zircon, 341 



Ceylonite, 299 

 Chalcedony, 504 

 agate, 512 



-onyx, 512 



patches in ruby, 267 



Chal-che-we-te, 398 

 Chalchihuitl, 398, 468 

 Change of colours, 6^, 433 

 Changeant, 433 

 Chatoyancy, 64 

 Chatoyant, chrysoberyl, 302 



stones, 581 



Chemical analysis, 8 



composition, 7 



Chennur (India), diamond, 145 

 Cherry-pearls, 592 

 Chessylite, 527 

 Chiastolite, 416 

 Chile, 444 



Chinese Empire, 139, 294, 388, 

 461, 468, 470, 501, 503, 507, 



599 



Chips (diamond), 214 



Chlorastrolite, 422 



Chloromelanite, 457, 465 



Chrysoberyl, 300 



(spodumene), 455 



-cat's-eye, 302 



Chrysocolla, 420, 527 



Chrysolite, 404, 405 



aquamarine- (beryl), 324 



Cape (prehnite), 421 



Ceylonese (tourmaline), 



372 



(chrysoberyl), 303 



(demantoid), 362 



(idocrase), 411 



noble (olivine), 405 



oriental (chrysoberyl), 302 



(corundum), 293 



pseudo- (moldavite), 449 



Saxon (topaz), 331, 333 



water- (moldavite), 449 



Chrysoprase, 497 



Chutia Nagpur, diamond, 150 



Cincor4 stones, 173 



Cinnamon-stone, 350 



Citrine, 486 



Classification of precious stones, 

 106 



Clear amber, 537 



Cleavage, 26 



cracks, 28 



face, 27 



form, 27 



(diamond), 209, 213 



Cleaving the diamond, 242 



Cleopatra's emerald mines, 311 



Cliftonite, 233 



Closed setting, 89 



Clotures = cross facets, 7} 



Cloud-agate, 512 



chalcedony, 506 



Clouds, 92 



Cloudy amber, 537 



Cocaes (Brazil), diamond, 166 



Codavetty-Kallu (India), dia- 

 mond, 148 



Colenso diamond, 127 



Colesberg Kopje diamond mine, 

 182 



Collet, 73 



Colombia, 139, 312,464, 597 



Colophony of amber, 536 



Colorado ruby (garnet), 359 



Colour, 55 



change of, 63 



actual, 58 



■ apparent, 58 



groups, 566 



Colour, suite of, 55 

 Colouring, artificial, 59, 87 



of agate, 522 



Colourless stones, 566, 577 

 Common chalcedony, 506 



opal, 373, 385 



varieties, 2 



Compact aggregates, 511 



quartz, 496 



Compostela hyacinth (quartz), 



345 

 Compound system in S. African 



diamond mines, 216 

 Conchoidal fracture, 29 

 Condapetta (India), diamond, 



145 



Conductivity ■ for heat, 65 



Congo (French), 420 



Copal, 551 



Coral, 601 



-agate, 497, 512 



-banks, 607 



-fishing, 611 



silicified, 497 



Corallium johnstoni, 611 



lubrani, 610 



nobile, 601 



rubrum, 601 



secundum, 611 



Corals (amber beads), 547 



Cordierite, 408 



Cornelian = carnelian, 508 



Cornish diamonds (quartz), 477 



Corundum, 261 



colour-varieties, 264, 292 



Counterfeit stones, 94 



Cowee Creek (N. Carolina), 

 ruby, 279 



Cristaria plicata, 599 



Critical angle of optical reflec- 

 tion, 40 



Crocidolite, 494 



Cross-facets, 73 



rosette, 78 



-stone, 416 



Crown of a cut stone, 73 



of a rose, 78 



Crystal, 9 



■ (quartz), 474 



-systems, 9 



Crystalline form, 8 



— — structure, 9, 47 



Crystallised bodies, 8 



Crystallography, 9 



Crystals (diamond), 213 



Cubic system, 10, 47, 60 



Cuddapah (India), diamond, 143 



Culasse, 73 



Culet, 73 



Cupid's darts, 489 



Cut with double facets, 76 



