首页 > Term: substitute
substitute
Any substance represented to be, or used to imitate, a gemstone; e.g., plastic, glass, doublet, synthetic ruby, or natural spinel; all could be substitutes for natural ruby.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
0
创建者
- ed.young
- 100% positive feedback
(Milwaukee, United States)