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Gemmologist's Compendium - Robert Webster

Gemmologist's Compendium

By: Robert Webster, E. A. Jobbins (Revised by)

Hardcover Published: May 1998
ISBN: 9780719802911
Number Of Pages: 240

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Acknowledged as one of the most useful reference books available, the Gemmologists' Compendium has been the bible for professional and amateur gemmologists, as well as retail jewelers. It contains a comprehensive glossary on all aspects of gemstones and the terms associated with them and sections on manufactured gems, the enhancement of gem materials and the precautions necessary to avoid damage during manufacturing, repair and cleaning.

Preface to Fifth Editionp. 8
Preface to Seventh Editionp. 9
Country Name Changesp. 12
Alphabetical glossary of names and termsp. 13
Absorption spectrap. 148
Atomic bombardment of gemstonesp. 181
Artificial treatment of gemstonesp. 179
'Base' system for price of pearlsp. 221
Becke's method (SG)p. 131
Brinell scale of hardnessp. 115
Chemical composition of gems and precious metalsp. 210
Chemical treatmentsp. 181
Clarity Grading of Diamondsp. 224
Cleavagep. 114
Colour filtersp. 157
Colour grading, Comparison of schemes for diamondp. 225
Colours of Gemstonesp. 159
Composite stonesp. 173
Conversion formulaep. 231
Crystal systemsp. 111
Cuts for gemstonesp. 184
Damage to gemstonesp. 191
Density correction tablesp. 231
Diamond colour grading, Comparison of schemes forp. 225
Disclosure of treatmentsp. 184
Dispersion, Colourp. 142
Elements, Chemicalp. 216
Elements, Periodic classification ofp. 217
Emission lines for calibration, Spectralp. 156
Estimating weights of gemstonesp. 226
Flame testp. 195
Fluorescencep. 166
Fraunhofer lines, Majorp. 155
Gauges, Diamond and pearlp. 226
Gemmological organizationsp. 239
Geological time scalep. 220
Glassp. 175
Greek alphabetp. 236
Greek prefixes and their meaningsp. 236
Hardnessp. 114
Heat treatment of gemstonesp. 180
Imitation pearlsp. 176
Irradiation of gemsp. 181
Light spectrump. 155
Liquids for refractive index determinationp. 131
Manufactured gemstonesp. 169
Mercury spectrump. 156
Metric weightsp. 229
Minimum deviation (RI)p. 130
Mohs's scale of hardnessp. 115
Occurrence of gemstones, by countriesp. 205
Occurrence of gemstones, by speciesp. 197
Optical propertiesp. 133
Pearls, Calculations for pricingp. 221
Pearls, Damage top. 193
Pearls, Imitationp. 176
Periodic classification of chemical elementsp. 217
Plasticsp. 178
Pleochroismp. 144
Price of pearls, Calculations forp. 221
Refractive indexp. 128
Refractive index and specific gravity, Relation betweenp. 235
Snell's lawp. 128
Sources of further informationp. 238
Sources of gemstones, by countriesp. 205
Sources of gemstones, by speciesp. 197
Specific gravityp. 117
Staining of gemstonesp. 181
Streak testsp. 195
Synthetic gemstonesp. 169
Temperature conversion tablesp. 230
Tests, miscellaneousp. 196
Transparency of gemstones to X-raysp. 165
Troy ounce, Subdivisions ofp. 228
Ultra-violet light, Fluorescent colours underp. 166
Valencyp. 214
Weights, Metricp. 229
Weights, Units ofp. 227
X-rays, Transparency of gemstones top. 165
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9780719802911
ISBN-10: 0719802911
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 240
Published: May 1998
Country of Publication: GB
Dimensions (cm): 20.96 x 13.34  x 2.54
Weight (kg): 0.43
Edition Number: 7
Edition Type: Revised