Feature articles from this issue:

• Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek, Missouri River, and Dry Cottonwood Creek by Aaron C. Palke, Nathan D. Renfro, Jeffrey R. Hapeman, and Richard B. Berg

• Morphology of Colombian Emerald: Some Less Common Cases and Their Growth and Dissolution History by Karl Schmetzer and Gérard Martayan

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SKU: 9302301