Brazilian Diamonds: A Historical and Recent Perspective
Darcy Svisero, James E. Shigley, and Robert Weldon
Cuprian Liddicoatite Tourmaline
Yusuke Katsurada and Ziyin Sun
The Role of Silicon in the Color of Gem Corundum
John L. Emmett, Jennifer Stone-Sundberg, Yunbin Guan, and Ziyin Sun
Japanese Jadeite: History, Characteristics, and Comparison with Other Sources
Ahmadjan Abduriyim, Kazuko Saruwatari, and Yusuke Katsurada
Causes of Iridescence in Natural Quartz
Xiayang Lin and Peter J. Heaney
Characteristics of Gem-Quality By-Product Synthetic Zincite
Ji Zhang, Yujie Gao, and Guanghai Shi
Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).
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