Gemstones
著者
書誌事項
Gemstones
（Eyewitness handbooks）
Dorling Kindersley, c1994
- pbk
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注記
Includes index
内容説明・目次
内容説明
In this book, gemstone specialist Cally Hall explains how to recognize 130 varieties of stone, precious metals and valuable "organics" like amber and coral. Each gem is shown in its cut and rough state, with additional photographs of natural forms, and jewellery. The 800 photographs are annotated to highlight key features, with colour-coded panels to supply at-a-glance technical information, from crystal structure and chemical composition to optical quality.
目次
- What are gemstones?
- how are gemstones formed?
- where are gemstones found?
- physical properties
- crystal shapes
- optical properties
- natural inclusions
- polishing, carving and enraving
- gems through the ages
- history and folklore
- synthetic gemstones
- imitation and enhancement
- colour key
- precious metals - gold, silver, platinum
- cut stones - diamonds, rubies, topaz, opals, emeralds, sapphires
- organics - amber, shell, pearl, ivory
- table of properties.
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