This author, who is president of a consulting firm which handles gemstone marketing, has written a practical guide for the gift buyer, the investor, and the collector. In one of the comprehensive chapters, he analyzes the basic gemological properties of 12 families of gemstones along with the geographic sources, price ranges, and special considerations for the consumer. The consumer will also gain understanding of the grading system, grading reports, laboratory certificates, appraisals, investing, pricing cycles, and dealing with a jeweler. Appendixes contain information on how to judge the metal work and mounts and on the care and maintenance of gems. Recommended for public libraries. Mary Ann Wasick, West Allis P.L., Wis.