Gem Treatment Disclosure and U.S. Law
Thomas W. Overton
Lab-Grown Colored Diamonds from Chatham Created Gems
James E. Shigley, Shane F. McClure, Christopher M. Breeding, Andy Hsi-tien Shen, and Samuel M. Muhlmeister
The 3543 cm-1 Infrared Absorption Band in Natural and Synthetic Amethyst and Its Value in Identification
Vladimir S. Balitsky, Denis V. Balitsky, Galina V. Bondarenko, and Olga V. Balitskaya
Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).
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