Spring 2023

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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. P alke, 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 GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 9302301 Show more