Summer 2018

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Feature articles from this issue: Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep by Sally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley Black Diamo nds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions by Karen V. Smit, Elina Myagkaya, Stephanie Persaud, and Wuyi Wang An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road by H. Albert Gilg, Karl Schmetzer, and Ulrich Schüssler Cultured Pearls from Lake Kasumigaura: Production and Gemological Characteristics by Ahmadjan Abduriyim Gemological Characterization of Sapphires from Yogo Gulch, Montana by Nathan D. Renfro, Aaron C. Palke, and Richard B. Berg Features of Synthetic Diamonds by Sally Eaton-Magaña and Christopher M. Breeding Buy the synthetic diamonds chart from this issue GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 4301803 Show more