Feature articles from this issue: Natural-Color D-to-Z Diamonds: A Crystal-Clear Perspective by Sally Eaton-Magaña, Troy Ardon, Christopher M. Breeding, and James E. Shigley Inclusion and Trace Element Characteristics of Emeralds from Swat Valley, Pakistan by Hongshu Guo, Xiaoyan Yu, Yuyu Zheng, Zhulin Sun, and Miro Fei-Yeung Ng A History of European Royal Jewel Sales, Including Sotheby’s 2018 Auction of Marie Antoinette’s Jewels by Russell Shor Unique Raindrop Pattern of Turquoise from Hubei, China by Ling Liu, Mingxing Yang, and Yan Li Vietnam: Shell Nuclei, Pearl Hatcheries, and Pearl Farming by Nicholas Sturman, Kwanreun Lawanwong, Nuttapol Kitdee, and Devchand Chodhry GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 4302004