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Index
·DIAMONDS·
PREFACE
CONTENTS
LIST OF PLATES
CHAPTER I PRELIMINARY
Cape Colony
River Washings
CHAPTER II KIMBERLEY AND ITS DIAMOND MINES
The Pipes or Craters
The Kimberley Mine in Old Days
CHAPTER III KIMBERLEY MINES AT THE PRESENT DAY
The Compound System
Underground Workings
The Depositing Floors
Washing and Concentrating Machinery
CHAPTER IV COLLECTING THE GEMS
Automatic Diamond Collector
The Yield of Diamonds
Varieties of Diamonds Fancy Stones
Falling off of Yield with Depth
Stones other than Diamonds
CHAPTER V THE DIAMOND OFFICE
CHAPTER VI NOTEWORTHY DIAMONDS
CHAPTER VII BOART, CARBONADO, AND GRAPHITE
Graphite
Crystallisation
CHAPTER VIII PHYSICAL AND CHEMICAL PROPERTIES OF THE DIAMOND
Hardness
Density or Specific Gravity
Phosphorescence of Diamond
Conversion of Diamond into Graphite
Tribo-Luminescence
Absorption Spectrum of Diamond
Refractivity
The Diamond and Polarised Light
The Diamond and Röntgen Rays
Action of Radium on Diamond
Boiling- and Melting-point of Carbon
CHAPTER IX GENESIS OF THE DIAMOND
A New Formation of Diamond
CHAPTER X THE NATURAL FORMATION OF THE DIAMOND
CHAPTER XI METEORIC DIAMONDS
INDEX
FOOTNOTES:
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