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Feature articles from this issue: Laboratory-Grown Diamonds: An Update on Identification and Products Evaluated at GIA by Sally Eaton-Magaña, Matthew F. Hardman, and Shoko Odake Ge mological and Trace Element Characteristics of Cassiterite from Yunling, China by Wenqing Huang, Jungui Zhou, Ting Shui, Junyi Pan, Fanwei Meng, Rui Zuo, Shuxin Dong, and Suqiao Cao Gem-Quality Anorthoclase Feldspar from Southeast Vietnam by Le Ngoc Nang, Pham Minh Tien, Pham Minh, and Pham Trung Hieu Micro-Features of Tourmaline by Nathan Renfro, Tyler Smith, John I. Koivula, Shane F. McClure, and James E. Shigley GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 930-2402 Show more