PLATE I
Frontispiece
1. DIAMOND | 2. DIAMOND (Crystal) | 3. DIAMOND |
4. AQUAMARINE | 5. EMERALD | 6. AQUAMARINE |
7. TOPAZ | 8. EMERALD (Crystal in matrix) | 9. TOPAZ |
10. RUBY (Crystal) | 11. SAPPHIRE | 12. YELLOW SAPPHIRE (Oriental Topaz) |
13. RUBY | 14. SAPPHIRE (Crystal) | 15. STAR-RUBY |
GEM-STONES
GEM-STONES
AND THEIR DISTINCTIVE CHARACTERS
BY
G. F. HERBERT SMITH
M.A., D.Sc.
OF THE BRITISH MUSEUM (NATURAL HISTORY)
WITH MANY DIAGRAMS AND THIRTY-TWO PLATES
OF WHICH THREE ARE IN COLOUR
THIRD EDITION
METHUEN & CO. LTD.
36 ESSEX STREET W.C.
LONDON