INDEX
Reading edition
Absorption, 15
Adamantine luster, 40, 41
Agate, 128, 138, 172, 197
Alexandrite, 140
Almandite (see Garnet)
Altered stones, 247-249, 250-257
Amazonite, 176
Amethyst, 94, 170, 195, 196
Aquamarine, 143, 189
Azurite, 132, 148, 177, 199
Balances, Care and use of, 283-293
Beryl, 84, 143, 190
Bibliography, 301
Bloodstone, 172
Blue diamonds, 91
Blue-white diamonds, 91
Brazilian diamonds, 182
Brilliancy, 203
Brilliant cut stones, 233
Brilliant, Theory of the, 205
Brittleness of gems, 119
Brown stones, 95
Bubbles in gems, 103
Bubbles in glass, 81
Bubbles in scientific stones, 103
Burmah rubies, 154
Cabochons, 45, 216, 227
Carbon, 136
Carborundum, 54, 55, 56
Carnelian, 128, 138, 172
Cat's-eye, 44-46, 138, 171
Chalcedony, 138
Chrysoberyl, 45, 85, 122, 140, 157, 188
Chrysoberyl cat's-eye, 45, 46, 85, 188
Chrysolite, 176
"Cinnamon stone," 144
Citrine quartz, 161, 171, 195, 196
Cleaving of diamonds, 208
Cleaving of precious stones, 213
Color, cause of, in minerals, 15
Color of gems, 66-92
Colorless stones, 97
Corundum gems, 68-70, 73, 101, 121, 134, 137
Corundum gems, defects of, 101
Cultured pearls, 277-279
Cutting of diamonds, 209
Cutting of precious stones, 201-226
Demantoid garnet, 62, 64, 82, 130, 144, 169, 193
Density of minerals, 23
Diamonds, 61, 73, 91, 120, 134, 151-153, 179-186
Dichroism, 15-22, 113
Dichroscope, the, 17-20
Dispersion, 60-65
Double refraction, 5
Doublets, 41, 241-246
Emerald, 75-82, 143, 164, 189
Emerald, wearing qualities of, 109
Epidote, 9
Extraordinary ray, 16
Fancy diamonds, 91, 151
"Fire," cause of, 207
Forms of precious stones, 227-236
Garnet, 69, 82, 96, 130, 143, 144, 167-170, 192-194
Garnet, Almandite, 143, 168, 193
Garnet, Andradite, 82, 130, 144, 169, 193
Garnet, Demantoid, 62, 64, 82, 130, 144, 169, 193
Garnet, Pyrope, 144, 168, 192, 193
Glass, 62, 142
Glass imitations, 81, 237-249
"Golcondas," 180
"Grain base," price of pearls per, 271
Hardness, 47-54, 55-59, 113
Hardness and wearing qualities, 119-132
Hardness, Mohs's scale of, 48-51
Hardness, table of, 54
Hardness, test of, 51-54, 58
"Heliodor," 165
"Hope Blue" diamond, 91
Hyacinth, 166
Imitations of precious stones, 237-249
Imitations of pearls, 277-282
Imperfections, 111
Imperfections in corundum gems, 101
Imperfections in glass, 81
Imperfections in scientific stones, 104
Jacinth, 166
Jade, 128, 147, 175, 197
Jadeite, 128, 197
Jargoons, 166
Jasper, 128, 172
Kunzite, 195
Lapis lazuli, 132, 177, 199
Labradorite, 176
Luster, 38-42
"Make" of diamonds, 205-207
"Make" of precious stones, 220
Malachite, 132, 148, 177, 199
Metallic oxides, 137
Mineral species, 133-148
"Mixed cut" stones, 236
Mohs's scale of hardness, 48-51
Moonstone, 44, 45, 131, 146, 176, 198
Morganite, 165
"Nacre," 280
Naming precious stones, 149-163, 164-178
Nephrite, 129, 197
Occurrence of precious stones, 179-200
"Olivine" (see Demantoid Garnet)
Olivine, 83, 176
Onyx, 172
Opal, 44, 131, 139, 173
Ordinary ray, 16
"Orient" of pearls, 261
"Oriental" stones, 84, 156
"Paste" gems, 142, 237-241
Pearls, 258-276
"Peeling" pearls, 265
Peridot, 8, 130, 176, 198
Pink stones, 93
"Pinked" topaz, 250
Plasma, 172
Polishing of diamonds, 210
Polishing of precious stones, 218
Prase, 138, 172
Properties, definition of, 1
Purple stones, 94
Quartz, aventurine, 171
Quartz, citrine, 161, 171, 195, 196
Quartz gems, 45, 127, 171, 195, 197
Reflection, total, 204
Refraction, 4
Refraction, double, 8-13
Refraction, double, test for, 10, 112
Refractometer, 5
Rhodolite garnet, 168
"Roman" pearls, 279
Rose cut stones, 231
Rose quartz, 171, 197
Rubellite, 93
Ruby, 12, 67, 69, 153, 154, 186
Ruby, scientific, 99-108
Sapphires, 63, 87, 88, 155, 187
Sard, 172
Sardonyx, 172
Scientific stones, 99-108
Scientific stones, defects in, 104
Scientific stones, tests for, 99-108
Siam rubies, 154
Silicates, 141
"Silk" in rubies, 117
Slitting of precious stones, 213
South African diamonds, 184
Specific gravity, 23-37, 114
Sphene, 9, 62, 64
Spinels, 71, 90, 123, 140, 158, 188
Spodumene, 95, 170, 195
Star stones, 44, 46, 157
"Step cut" stones, 235
Structure of pearls, 258
Table, of hardness, 54
Table of refraction, 12-13
Table of specific gravity, 29
Tariff laws, 294-299
Test for double refraction, 10
Testing hardness, 51-54, 58
Testing imitations of pearls, 281
Testing unknown gems, 109-118
Tiger's-eye, 45, 138, 171
Topaz, 67, 73, 91, 124, 145, 159, 189
Toughness in stones, 119
Tourmaline, 72, 77, 79-81, 96, 146, 167, 194
"Triplets," 79, 246
Turquoise, 130, 148, 198
Unit of weight, 289
Variscite, 148
Vitreous luster, 41
Wearing qualities of gems, 119
Zircon, 9, 62, 72, 92, 97, 125, 147, 166, 191
Diamonds
A Study of the Factors that Govern their Value
By
Frank B. Wade
"I shall speak a little more of the diamonds, that they who know them not may not be deceived by chapmen who go through the country selling them, for whoever will buy the diamond, it is needful that he know them, ..."—Chap. XIV., The Voyages and Travels of Sir John Maundeville.
Table of Contents
I.—Colour.
II.—Flaws.
III.—"Make."
IV.—Repairing and Recutting.
V.—Mounting.
VI.—Buying the Engagement Ring.
G. P. Putnam's Sons
New York London
A Book of Precious Stones
The Identification of Gems and Gem Minerals and an Account of Their Scientific, Commercial, Artistic, and Historical Aspects
By Julius Wodiska 8vo. With 33 Full-page Illustrations and 4 Colored Plates
A description, in altogether a new fashion, of gems and gem minerals, their nature and history, comprehensible to every reader, and of prime value to students and to jewelers.
The general reader will enjoy the simple descriptions of the origin, development, and treatment of the diamond, sapphire, and other precious stones, as well as of the beautiful semi-precious stones. Just enough of the technical has been provided to make the new gem book a vade mecum for students of gem minerals and for the army of jewelers in the United States, as well as their fellow-craftsmen and merchants in all English-speaking places. The art and industry of mounting gems is somewhat elaborately covered, especially as exemplified in the work of students at technical schools and the many unattached workers in jewelry designing and making who form a part of the Arts and Crafts movement. Some of the quaint superstitions about gems in the chapter on folklore have a curious interest. The author takes cognizance of the public desire nowadays for the novel and uncommon in gems, and shows that prospectors, gem miners, mineralogists, and jewelers are co-operating to greatly lengthen the lists of popular semi-precious stones. A chapter is devoted to collections of gems in museums.
G. P. Putnam's Sons
New York London
Transcriber's Note:
Inconsistent hyphenation and spellings have been standardised, although consistent variants remain as printed. Minor typographical errors have been corrected without note, whilst significant changes are listed below.
p. 13, 'indentity' amended to identity: '... of unknown identity comes along ...';
p. 20, 'dischroism' amended to dichroism: '... but shows hardly any dichroism.';
p. 67, 'quart' amended to quartz: '... (quartz topaz) ...';
p. 118, 'Saphire d'eau' amended to Saphir d'eau;
pp. 140, 143, 'berylium' amended to beryllium;
pp. 148, 318, 'Varicite' amended to Variscite;
p. 157, 'Csar' amended to Czar: '... Czar Alexander II., in whose ...';
p. 167, 'rubelite' amended to rubellite: '... sometimes called "rubellite," and white ...';
p. 190, 'Minas Garaes' amended to Minas Geraes;
p. 199, 'Khorassan' amended to Khorasan: '... province of Khorasan in Persia ...';
p. 227, 'caboch' amended to caboche;
p. 258, 'uniomargarifer' amended to Unio margaritifera;
p. 298, 'mechandise' amended to merchandise: '... tax on imported merchandise ...';
p. 301, 'Emanual' amended to Emanuel: '... Diamonds and Precious Stones, by Harry Emanuel ...';
p. 301, 'Hatten' amended to Hotten: '... John Camden Hotten ...';
p. 308, 'Streetor' amended to Streeter: 'Precious Stones and Gems by Edwin W. Streeter ...';
p. 314, 'Epidot' amended to Epidote.