This reference for non-experts reveals secrets of gemology and gem identification to hobbyists, collectors, investors, and owners of jewelry businesses. It explains how to select and when and how to use essential and optional equipment and instruments. One section is devoted to antique and estate jewelry. The book's final section contains an extensive glossary, tables of gem stone properties, equipment suppliers in the US and Canada, and international lists of schools, gem testing labs, and associations. It contains b&w photos throughout and 12 pages of color photos. This fifth edition contains new material on synthetic gems, composite imitations, ruby imitations, and HPHT-treated diamonds. Matlins has written other books on gems. Bonanno was founder of the National Gem Appraising Laboratory. Annotation ©2013 Book News, Inc., Portland, OR (booknews.com)