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.