The spectroscope and gemmology

Front Cover
Contents include the history and development of spectroscopy; a discussion of the nature of absorption spectra and the absorption spectra of solids and gem minerals; the many uses of the spectroscope and the spectrophotometer; light sources and the causes of color; absorption in synthetic gemstones; and more. Written for gemologists everywhere and incorporating the latest developments, The Spectroscope and Gemmology is an indispensable textbook for professional and amateur gemologists and students of gemology.

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Contents

List of Illustrations
7
Preface
13
The History and Development of Spectroscopy
17
The Celebrated Phaenomena of Colours
19
The Yellow Lines of Sodium
26
The Absorption Spectra of Solids
32
Other Uses of the Spectroscope
38
Emission Spectra
43
Absorption Spectrum of Blue Spinel
133
Absorption Spectra of Peridot and Sinhalite
138
Absorption Spectra of Enstatite and Diopside
144
Absorption Spectra of Kornerupine and Axinite
150
Absorption Spectra of Green Tourmaline and Iolite
155
Absorption Spectra of Idocrase Actinolite and Serpentine
160
Absorption Spectra of Sapphire and Chrysoberyl
165
Spodumene and Jadeite
170

The Quartz Spectrograph
49
The Spectrophotometer
54
Absorption of Gem Minerals
61
Absorption Spectra
63
Light Sources
70
The Causes of Colour
76
Absorption and Fluorescence Spectrum of Ruby
80
Absorption and Fluorescence Spectrum of Red Spinel
86
Absorption Spectra of Pyrope and Topaz
92
Absorption Spectrum of Emerald
98
Absorption Spectrum of Alexandrite
106
Absorption Spectrum of Jadeite
111
Absorption Spectrum of Demantoid Garnet
118
Other Chromium Spectra
123
Absorption Spectrum of Almandine Garnet
127
Absorption Spectra of Andradite and Epidote
174
Absorption Spectra Due to Manganese
177
Absorption Spectra Due to Cobalt and Vanadium
184
The Spectrum of Turquoise
190
Absorption Spectra of Zircon
194
The Rare Earth Elements
203
Absorption Spectra of Diamond
214
Miscellaneous Spectra
223
Absorption in Synthetic Gemstones
226
Absorption Spectra of Glasses
234
Fluorescence Spectra
239
Summary of Absorption Spectra
248
References and Notes
257
Index
263
Copyright

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About the author (1998)

R. Keith Mitchell, FGA, Tully Medalist and vice-president of the Gemmological Association, was instructor to the G.A. courses for more than twenty years, and the author of many papers on gemology.

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