ISBN 10: 7562545545 ISBN 13: 9787562545545
Da: liu xing, Nanjing, JS, Cina
EUR 83,64
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Aggiungi al carrellopaperback. Condizione: New. Paperback. Pub Date: 2019-05-01 Language: Chinese Publisher: China University of Geosciences Press Diamond Identification and Grading is divided into 4 modules: diamond overview. basic characteristics and identification of diamonds. 4C grading of diamonds and diamond trade.?Diamond Appraisal and Grading focuses on the integration of theory and practice. and the content is gradual. focusing on intensive training of professional skills. so as to improve the professional quality of the practitio.