Fall 2011

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The PDF version of this issue is available at no charge. Visit www.gia.eduRuby and Sapphire from the Tan Huong-Truc Lau Area, Yen Bai Province, Northern VietnamNguyen Ngoc Khoi, Ch akkaphan Sutthirat, Duong Anh Tuan, Nguyen Van Nam, Nguyen Thi Minh Thuyet, and Nguy Tuyet NhungInfrared Spectroscopy of Natural vs. Synthetic Amethyst: An UpdateStefanos Karampelas, Emmanuel Fritsch, Triantafillia Zorba, and Konstantinos M. ParaskevopoulosExploring the Origin and Nature of Luminescent Regions in CVD Synthetic DiamondBert Willems, Alexandre Tallaire, and Julien BarjonIdentification of Extraterrestrial Peridot by Trace ElementsAndy H. Shen, John I. Koivula, and James E. ShigleyA History of Diamonds through Philately: The Frank Friedman CollectionStuart D. OverlinEvery issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International). GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout.Usually ships in 3-5 business days. SKU: 4301104 Show more