gestone

例句：

1. 1. The diamond is the most valuable gem in the world.
   钻石是世界上最珍贵的宝石。
2. 2.She wore a beautiful necklace made of precious gems.
   她佩戴了一条由珍贵宝石制成的美丽项链。
3. 3. Gemstones are often used to make jewelry and ornaments.
   宝石常被用来制作珠宝和装饰品。