| Description |
1 online resource (146 p.) |
| Contents |
Cover -- Title -- Copyrights -- Content -- Acknowledgements -- 1 Introduction -- 2 The emerald mines in the Tokovaya area -- a short historical overview -- 3 Discovery, naming and historical use of Russian alexandrite -- 3.1 The first mineralogical descriptions of alexandrite -- 3.2 Documents from the Nordenskiöld family archive and correspondence with Berzelius -- 3.3 Emeralds and alexandrites from the Leuchtenberg, Koksharov and Kochubei collections -- 3.3.1 Emeralds and alexandrites from the Leuchtenberg collection |
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3.3.2 The largest alexandrites -- samples and brief history of the Kochubei and Koksharov collections -- 3.3.3 Kokovin's or Kochubei's emerald? -- 3.4 The naming of alexandrite -- 3.5 Developments in the late 19th century -- 3.6 Alexandrite or diaphanite? -- 3.7 Use and production of alexandrite -- 4 Russian alexandrites in mineralogical museums and in the trade -- 5 Morphology and twinning -- 5.1 Review of the literature -- 5.2 Morphology and twinning in Russian alexandrite in particular -- 5.2.1 Single crystals -- 5.2.2 Single contact twins -- 5.2.3 Cyclic twins (trillings) |
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6 Mineralogical and gemmological properties -- 6.1 Mineral assemblages -- 6.2 Gemmological properties -- 6.3 Chemical properties -- 6.4 Microscopic properties -- 6.4.1 Examination of structural properties (twinning and growth structures) in alexandrite -- 6.4.2 Twinning -- 6.4.3 Growth structures -- 6.4.4 Mineral and fluid inclusions in faceted stones -- 6.5 Mineral assemblages, growth conditions and growth sequences -- 7 Alexandrite cat's-eyes and chrysoberyl stars -- 7.1 Alexandrite cat's-eyes from Russia -- 7.2 Alexandrites from Sri Lanka with needle-like inclusions |
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7.3 Asteriated chrysoberyl from Sri Lanka -- 8 Comparison of growth patterns of Russian, other natural and synthetic alexandrites -- 9 Colorimetric data of Russian alexandrite and yellowish green to green chrysoberyl -- 9.1 The three-dimensional CIELAB colour space and colorimetric parameters -- 9.2 Materials and methods -- 9.3 Dependence of colour change on sample orientation -- 9.4 Distinction of alexandrite from yellow to green colour-change chrysoberyl -- 9.5 Alexandrite or green chrysoberyl from India -- a practical application -- 10 Trace element chemistry and locality determination |
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10.1 Origin determination in gemmology -- 10.2 Principles of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) -- 10.3 Materials and methods -- 10.4 Trace element content of Russian alexandrites and green chrysoberyls -- 10.5 Separation of Russian alexandrites from other sources -- Appendix -- Tables 1-7 -- Transcription of names -- Timetable -- References -- Index |
| Notes |
Description based upon print version of record |
| Subject |
Alexandrit
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| Form |
Electronic book
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| Author |
Bosshart, George
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Epelboym, Marina
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Kiefert, Lore
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Malsy, Anna-Kathrin (Contrib.)
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| ISBN |
9783510654666 |
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3510654668 |
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