Ruby & Sapphire: A Gemologist's Guide (2017)
By Richard W. Hughes with Wimon Manorotkul and E. Billie Hughes
This massive volume is the most comprehensive book ever written on a single precious stone. It is aimed specifically at working gemologists, appraisers and students. 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. Ruby & Sapphire—A Gemologist’s Guide represents the definitive reference on the subject. Inside you will find over 1000 photos, maps and illustrations, and 3500 references.