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INDEX.
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Page Absorption spectra . . 81, 93 |
Adamas ..... 67 I Agate .... 100, 130 Alexandrite . . . .90 Almandine . . . 80, 126 Amazonstone . . . .106 Amber . . . .112
Amethyst . 90, 102, 129
Amethyst, oriental . . 66, 123
Anatase.....108
Andalusite .... 109 Andradite .... 85
Antigorite .... 47
Apatite.....118
Apophyllite . . . 108, 132 Aquamarine ... 89, 127 Artificial Stones . . 48, 51
Association of Gems. . . 32 Asterism . . . . 62, 81 Avanturine Felspar . . 101, 131 Avanturine Quartz .. . 100, 130
Axinite.....107
Azure Stone . . . 102, 114
Balas ruby . · . .68 Beryl .... 87, 127 Beryllonite .... 92
Bezel.....26
Black coral . . .118
Bloodstone . . 101, 131
Blue stones . . 24, 45
Boart .... 31, 61 Bobrovka Garnet ... 84 Bouteillenstein ... 86
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Page Brilliant-cut ... 26
Brilliants.....56
Bronze .... 104 Burmite.....113
Cabochon-cut .... 29 Cacholong ... 99
Cadmium borotungstate . . 14 Cairngorm . . . 101, 129
Callainite.....71
Cameos ... .99, 102 Carat ..... 59 Carborundum . . . .31 Carbuncle ... 80, 126
Cassiterite .... 107 Cat's eye . . 40, 104, 127, 131
Chalcedony . . . 101, 130 Chatoyancy . . . 6, 91
Chrysoberyl . . . 90,127 Chrysolite .... 85
Chrysoprase . . . 101, 130 Cinnamon stone . 80, 126
Clôtures.....26
Colenso diamond ... 59
Collet.....27
Copal.....113
Coral.....117
Cordierite . .103
Cornelian . . . .101, 131 Corundum ... 61, 124 Ciocidolite . . 104. 131
Cross facets .... 26 Crown of a stone . , 26
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