蓝晶石

例句：

1. 1. The blue sapphire is a rare gem that has been prized for centuries.
   这个蓝晶石是一块珍贵的宝石，被人们珍视了几个世纪。
2. 2. The blue sapphire was found in the depths of the ocean, and its beauty was unmatched.
   这块蓝晶石是在海洋深处被发现的，它的美丽无与伦比。
3. 3. The blue sapphire was given as a gift to a friend who had just moved to a new city.
   这块蓝晶石作为礼物送给了一位刚搬到新城市的好友。