Gemmologists' compendium

Front Cover
Van Nostrand Reinhold, Jan 1, 1980 - Antiques & Collectibles - 240 pages
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Provides a glossary of names and terms, and tables of information needed for gem identification

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Contents

PART
11
Emission lines for calibration Spectral
50
Base system for price of pearls 225
70
Refractive index and density Relation between 236
95
Cleavage
117
Specific gravity
120
Staining of gemstones 182
138
Fraunhofer lines Major
158
Gauges Diamond and pearl 227
180
Conversion formulae 229
184
Light spectrum 157
205
Valency
212
Damage to gemstones
219
Minimum deviation S G 132
221
Weights Metric
229
Density correction tables
232

Colour filters
159
Synthetic gemstones
166
Composite stones
176
Precious metals Acid tests for
236
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