Da: ReadCNBook, Nanjing, JS, Cina
paperback. Condizione: New. Paperback. Pages Number: 286 Language: Chinese. Publisher: Tongji University Press; No. 3 (July 1. 2009). gem Introduction (3rd edition) is set ten years of gemological research and teaching experience. combined with the advanced teaching materials abroad gemology gem industry and domestic long-term results and experience gained from writing. The book describes a comprehensive system based on knowledge of gemology. the basic characteristics of various precious stones. true and false identific. Codice articolo 313946
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