홈 > Term: descriptive gemology
descriptive gemology
The classification, composition, properties, trade grades, sources, and the methods of recovery, fashioning, and use of gem minerals and gem materials and their substitutes.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
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- ed.young
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