gemstone

例句：

1. 1. The diamond is the most valuable gemstone in the world.
   钻石是世界上最珍贵的宝石。
2. 2.She wore a beautiful necklace made of rubies and sapphires as a symbol of her heritage.
   她佩戴着一串由红宝石和蓝宝石制成的项链，作为她遗产的象征。
3. 3. The gemstone was set into the center of the ring to catch the light.
   这块宝石被镶嵌在戒指的中心以吸引光线。