620 



INDEX 



Cut with elongated brilliant 



facets, ^6 

 Cutting, forms of, 72 



object of, 71 



of the diamond, 242 



- — ■ — or slitting disc, 84 

 process of, 79 



Cyanite = kyanite, 413 

 Cymophane, 302 



Dam-stone (amber), 544 



Dammar-resin, 552 



Danau Rajah, supposed dia- 

 mond, 247 



Darya-i-noor diamond, 250 



De Beer's Consolidated Mines, 

 Limited, 198 



diamond mine, 182, 187, 



197, 206, 212 



Dead coral, 613 



Demantoid, 361 



Dendrites, 56, 386 



Dendritic agate, 506 



markings, 56 



Denmark, 541 



Density (specific gravity), 1 1 



Dentelle of a rose, 78 



Depositing floors, diamond- 

 fields, 202 



Determination of precious 

 stones, 561 



Dewey diamond, 226 



Diallage, 453 



Diamantina (Brazil), diamond, 

 158 



Diamantino (Brazil), diamond, 

 171 



Diamond, 42, 44, 83, 113-260 

 — see Table of Contents 



Bristol, Cornish, etc. 



(quartz), 477 



false (quartz), 479 



grain, 104 



Marmorosch (quartz), 477 



Matura (zircon), 342, 343 



occidental (quartz), 479 



pseudo- (quartz), 479 



Dichroism, 59 



Dichroite, 408 



Dichroscope, 60, 563 



Diopside, 453 



Dioptase, 419 



Dispersion of light, 42 



in diamond, 131 



Dispersive power, 43 



Disthene = kyanite, 413 



Distinguishing precious stones, 

 561 



Dop, 80 



Depp, 80 



Double cabochon, 79 



cut brilliant, 74 



facets, cut with, "]& 



refraction, 46, 60 



anomalous, 53 



strength, of 54 



rosette, 78 



Doublet, 96 



false, 96 



genuine, 96 



hollow, 97 



■ — — semi-genuine, 96 



Dravite, 366, 372 



Dra ivn-amber, 541 



Dresden green diamond, 134, 



252 

 Dresden's (Mr. E.) diamond, 



252 

 Druses, 68 

 Drusy cavities, 68 

 Dry diggings, 182, 187 

 Du Toit's Pan diamond mine, 



182, 187, 197, 207, 212 

 Dudley diamond, 253 

 Dust, 92 



-pearls, 592 



Dutch bort (zircon), 193 



rose, 78 



Dutch Guiana, 229, 509 

 Dutoitspan = Du Toit's Pan 



ECLOGITE, diamond in, 197 

 Egypt, 310, 340, 386; 407, 468, 



500, Sio, 527 

 Egyptian jasper, 500 



turquoise, 397 



Eisenkiesel, 345, 499 

 Elaeolite, 436 

 Electric calamine, 423 

 Electrical characters, 66, 565 

 Elie rubies (garnet), 359 

 EUore (India), diamond, 148 

 Embedded crystals, 68 

 Emden (diamond), 214 

 Emerald, 308 



Brazilian (tourmaline), 



372 



-copper, 419 



false (fluor-spar), 529 



lithia- (spodumene), 455 



mother-of- (quartz), 488 



oriental (corundum), 293 



Peruvian, 312 



Spanish, 312 



Uralian (garnet), 362 



Emery, 82 



Empress Eugenie diamond, 251 



En cabochon cut, 79 



En pave mounting, 359 



Enamel, 100 



Enclosures in amber, 540 



in diamond, 118 



in quartz, 489 



Engin, 611 



England, 413, 416, 477, 485 

 527, 528, 53°, S33, SS3. 557, 



599 

 English double-cut brilliant, 74 



Engraving, 85 



agate, 520 



diamond, 245 



Enhydros, 507 

 Epidote, 417 

 Essence d'Orient, 600 

 Essonite = hessonite, 350 

 Etching, 87 

 Euclase, 324 

 Excelsior diamond, 254 

 Eye-agate, 512 



Facet, 72 



Fallow topaz, 332 



False amethyst (fluor), 529, 530 



diamond (quartz), 479 



emerald (fluor), 529,530 



lapis-lazuli (agate), 524 



ruby (fluor), 529 



sapphire (fluor), 529,530 



topaz (fluor), 529 



(quartz), 487 



Fancy stones, 2 



(diamond), 211 



Fantasy-pearls, 587, 593 

 Faroe Islands, 385, 386, 387, 



388, 506 

 Fashion in jewellery, 2, 102 

 Faults in precious stones, 91 

 Favas, 161 

 Feathers, 28, 93 

 Feijas, 161 

 Felspar group, 424 



adularescent, 429 



avanturine-, 427 



Labrador-, 432 ■ 



labradorescent, 431 



Feminine carnelian, 508 



colours, 56 



ruby, 265 



sapphire, 283 



Ferruginous quartz, 499 

 Fettstein, 436 

 Feuerstein, 472 

 File, use of, 32 

 Fire, 36, 45 



of diamond, 131 



-opal, 384 



stone, 472 



First by-water (diamond), 211, 



213 

 Firuzeh, 393 



