Definition: a hard, valuable substance that is often used in jewelry Level: B1
钻石和红宝石是珍贵的宝石。
Diamonds and rubies are precious ___stones.
她的戒指中央有一颗闪闪发光的小宝石。
Her ring has a small, sparkling ___stone in the center.
这条项链镶嵌着一颗美丽的蓝色宝石。
The necklace featured a beautiful blue ___stone.
