Treated Diamonds, the third book in the Gems & Gemology in Review series, is now available. The 300-page book is a collection of articles, Lab Notes, Gem News entries and conference abstracts on treated diamonds published in Gems & Gemology (G&G), GIA's award-winning quarterly journal, from 1938 through 2007.

The world of diamond treatments has come a long way in the last 70 years. This book chronicles the development of color treatments -- coating, irradiation and high-pressure, high-temperature (HPHT) annealing -- as well as clarity treatments in the form of laser drilling and glass filling.

"Color- and clarity-treated diamonds are widespread in the jewelry industry, and their recognition has been a major focus of gemological research for several decades," said Dr. Jim Shigley, GIA's distinguished research fellow and editor of Treated Diamonds.

The book also features a history of diamond treatments, overviews of each of the treatment types, commentary from industry leaders, and a full-size "Identification of Filled Diamonds" chart. A consolidated reference section and index are also provided.

The two previous volumes in the series, Synthetic Diamonds and Colored Diamonds, are also available from G&G.

Gems & Gemology in Review: Treated Diamonds is available for purchase for $59.95 plus shipping. Buy all three books for a special package price of $150 plus shipping.

For more information or to order, visit Gems & Gemology

E-mail gandg@gia.edu

Tel +1 (760) 603-4000, ext. 7142