As the book is now sold out worldwide, we were able to obtain several copies of the PRESENTATION EDITION with a special numbering in each book. Only 100 of such books were made and are therefor higher priced, Buy your copy now ! Designed as a companion to Ruby & Sapphire: A Collector's Guide, this massive volume is aimed specifically at working gemologists, appraisers and students. Based on Richard W. Hughes' 1997 classic, Ruby & Sapphire, this edition is fully updated. The product of nearly 40 years of firsthand experience and research, it covers every aspect of the subject from A–Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. With over 1000 photos, maps and illustrations and 3500 references, Ruby & Sapphire—A Gemologist’s Guide represents the most comprehensive book ever written on a single precious stone. by Richard W. Hughes with Wimon Manorotkul and E. Billie Hughes
