Richard W. Hughes
Published: 1990
Total Pages: 348
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Hughes, of the Asian Institute of Gemological Sciences, Bangkok, looks in detail at all aspects of rubies and sapphires, which, among the most sought after and precious of gems, account for over half of the world trade in colored gemstones. Includes 24 color plates and many bandw figures. Annotation copyrighted by Book News, Inc., Portland, OR