2. A clear, hard variety of corundum used as a gemstone that is usually blue but may be any color except red. 一种透明的坚硬钢玉,用作宝石,通常为蓝色,但也可能是除红色以外其它任何颜色。
3. Luminiferous gem is the man made modern night shining jewel developed with modern technology by research workers and caused strong echo in gemstone circle. 发光宝石是近期由我国的科学工作者依靠现代科学技术研制出的“现代夜明珠”,在宝石界引起强烈反响。
英英解释
n.
1. a crystalline rock that can be cut and polished for jewelry