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CONTENTS.

1. Introduction ................................................................................................................................................................................................................................................................................................................................................................................................

   xiii

2. CHAPTER I.

3. ON THE DIAMOND.

4. SECT.

5. 1

   Preliminary Observations ................................................................................................................................................................................................................................................................................................................................................................................................

   1

6. 2

   Commercial value of diamonds ................................................................................................................................................................................................................................................................................................................................................................................................

   9

7. 3

   Remarks on the purchase and sale of diamonds ................................................................................................................................................................................................................................................................................................................................................................................................

   15

8. 4

   Physical and chemical characters ................................................................................................................................................................................................................................................................................................................................................................................................

   28

9. 5

   Natural history, localities, &c. ................................................................................................................................................................................................................................................................................................................................................................................................

   34

10. 6

    Notice of peculiar diamonds ................................................................................................................................................................................................................................................................................................................................................................................................

    41

11. 7

    Commercial history of rough diamonds ................................................................................................................................................................................................................................................................................................................................................................................................

    48

12. 8

    Art of cutting, splitting, sawing, and polishing diamonds ................................................................................................................................................................................................................................................................................................................................................................................................

    67

13. CHAPTER II.

14. ON COLORED STONES.

15. SECT.

16. 1

    Oriental stones.—Sapphire, Ruby, Amethyst, and Topaz ................................................................................................................................................................................................................................................................................................................................................................................................

    85

17. 2

    Chrysoberyl or Oriental Chrysolite, Cymophane ................................................................................................................................................................................................................................................................................................................................................................................................

    98