Table of Contents
1 Introduction 4
The gemstones 47
2 Well-known gems 48
Andalusite 49
Apatite 51
Azurite 53
Beryl and its varieties 54
Chrysoberyl 67
Corundum - ruby and sapphire 72
Diamond 85
Diaspore 103
Diopside 105
Feldspar Group 107
Fluorite 115
Garnet Group 118
Iolite 128
Jade 130
Kyanite 136
Lapis lazull 138
Malachite 139
Opal 141
Peridot 146
Quartz and its varieties 149
Rhodochrosite 167
Rhodonite 168
Scapolite 169
Sillimanite 171
Sodalite 172
Spinel 173
Spodumene 176
Tanzanite 178
Tektite 181
Topaz 184
Tourmaline 188
Turquoise 194
Zircon 197
3 Lesser-known gems 200
Benitoite 201
Calcite 203
Kornerupine 204
Painite 206
Phenakite 207
Sinhalite 208
Sphalerite 209
Taaffeite 210
Titanite 211
4 Organic gems 212
Amber 213
Ammolite 217
Coral 218
Ivory 219
Jet 221
Pearl 223
Shell 228
Tortoiseshell 229
Further information 230
Index 231
Picture credits 239
Author biography and Acknowledgements 240