| | | PAGE |
| I. | | Frontispiece |
| II. | Refractive Index Diagram | 36 |
| III. | Interference Figures | 48 |
| IV. | Jewellery Designs | 62 |
| V. | Jewellery Designs | 88 |
| VI. | Appliances used for Polishing Diamonds | 102 |
| VII. | Polishing Diamonds | 103 |
| VIII. | Slitting and Polishing Coloured Stones | 104 |
| IX. | Faceting Machine | 105 |
| X. | Lapidary’s Workshop and Office in England | 106 |
| XI. | Lapidary’s Workshop in Russia | 107 |
| XII. | French Family Cutting Stones | 108 |
| XIII. | Indian Lapidary | 109 |
| XIV. | Blowpipe used for the Manufacture of Rubies and Sapphires | 118 |
| XV. | Kimberley Mine, 1871 | 140 |
| XVI. | Kimberley Mine, 1872 | 141 |
| XVII. | Kimberley Mine, 1874 | 142 |
| XVIII. | Kimberley Mine, 1881 | 143 |
| XIX. | Kimberley Mine at the Present Day | 144 |
| XX. | Wesselton (open) Mine | 145 |
| XXI. | Loading the Blue Ground on the Floors, and Ploughing it over | 146 |
| XXII. | Washing-Machines for Concentrating the Blue Ground | 147 |
| XXIII. | Diamond-Sorting Machines | 148 |
| XXIV. | Kafirs Picking out Diamonds | 149 |
| XXV. | Cullinan Diamond (natural size) | 168 |
| XXVI. | Large Aquamarine Crystal (one-sixth natural size), Found at Marambaya, Minas Geraes, Brazil | 196 |
| XXVII. | Gem-Stones (in colour) | 226 |
| XXVIII. | Opal Mines, White Cliffs, New South Wales | 252 |
| XXIX. | Gem-Stones (in colour) | 256 |
| XXX. | Natives Drilling Pearls | 294 |
| XXXI. | Metal Figures of Buddha Inserted in a Pearl-Oyster | 296 |
| XXXII. | Sections of Culture Pearl | 297 |
