中国日报网23 天
A tradition set in stone
Jade is to the Chinese whatever a treasure stone is to a child, and much, much more ... The heaven, of course, is also a ...
IFLScience on MSN1 个月
Diamonds May Be Hard, But Jade Is The World’s Toughest Natural Mineral
For gemstones, it all comes down to whether a stone is more resistant to scratching or breaking. Jade has been an important .