红宝石

例句：

1. 1. The emerald is the most valuable gemstone in the world.
   翡翠是世界上最珍贵的宝石。
2. 2. She wore a necklace with a beautiful red ruby.
   她戴着一条镶有一颗美丽的红宝石的项链。
3. 3. The ruby was set into the ring as a symbol of love.
   这颗红宝石被镶嵌在戒指上，作为爱情的象征。