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Feature articles from this issue: The 3309 cm–1 Series in Sapphire and Ruby: A Focus on FTIR Peak Position Variation by Wasura Soonthorntantikul and Aaron C. Palke A Study of the W inston Red: The Smithsonian’s New Fancy Red Diamond by Gabriela A. Farfan, Ulrika F.S. D’Haenens-Johansson, Stephanie Persaud, Eloïse Gaillou, Russel C. Feather II, W. Henry Towbin, and Daniel C. Jones Emeralds in Catherine de’ Medici’s Pendant: An Unexpected Geographic Origin by Gérard Panczer, Robin Fesquet, Lasha Moshi, Geoffray Riondet, Marie-Laure Cassius-Duranton, Lætitia Gilles-Guéry, Aurélien Delaunay, and Stefanos Karampelas GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 930-2501 Show more