1) gemstone colour losing
宝石失色
1.
In this paper, the gemstone colour losing that usually occurs in stone-in-place casting process is described, the causes of colour losing are analyzed and corres.
对蜡镶铸造过程中经常出现的宝石失色问题进行了原因分析,并提出了相应的解决措施。
2) black gemstone
黑色宝石
1.
The prospect of black gemstones designing and processing;
黑色宝石的设计、加工及开发前景
4) coloured gemstone
有色宝石
1.
In international coloured gemstone trade, all the asking price and bid price are given according to the total quality grade (1 to 10 ) and carat of coloured gemstones.
国际贸易中有色宝石的报价主要是按其总品质级别和克拉质量给出的。
5) colour of the gem
宝石颜色
补充资料：黯然失色
1.指相比之下，事物仿佛失去原有的色泽﹑光彩。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条