Feature articles from this issue: Geology and Development of the Lomonosov Diamond Deposit, Northwestern Russia by Karen V. Smit and Russell Shor Carbonado Diamond: A Review of Properties and Origin by Stephen E. Haggerty Photoluminescence Mapping of Optical Defects in HPHT Synthetic Diamond by Lorne C. Loudin An Update on Tourmaline from Luc Yen, Vietnam by Nguy Tuyet Nhung, Le Thi Thu Huong, Nguyen Thi Minh Thuyet, Tobias Häger, Nguyen Thi Le Quyen, and Tran Thi Duyen Characterization of Mg and Fe Contents in Nephrite Using Raman Spectroscopy by Xiaoyan Feng, Yong Zhang, Taijin Lu, and Hui Zhang Inclusions in Natural, Synthetic, and Treated Sapphire by Nathan D. Renfro, John I. Koivula, Jonathan Muyal, Shane F. McClure, Kevin Schumacher, and James E. Shigley Big Sky Country Sapphire: Visiting Montanaís Alluvial Deposits by Tao Hsu, Andrew Lucas, Robert E. Kane, Shane F. McClure, and Nathan D. Renfro Every 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. Buy the sapphire inclusion chart from this issue Usually ships in 3-5 business days. SKU: 4301703
