Feature articles from this issue:

• The Primary Sapphire Occurrence at French Bar Sill Along the Missouri River, Near Helena, Montana by Robert E. Kane, Kory L. Pettman, Aaron C. Palke, Rachelle B. Turnier, Richard B. Berg, Nathan D. Renfro, and Christopher P. Smith
• Characterization of Emeralds from Zhen’an County in Shaanxi, China by Yi Guo, Xiao-Yan Yu, and Yu-Yu Zheng
• An Evaluation of Turquoise from the Mona Lisa Mine in Arkansas by Alexander A. Goodsuhm

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SKU: 930-2504