科依诺尔钻石

例句：

1. 1.The Koinalo diamond is one of the most valuable gems in the world.
   科依诺尔钻石是世界上最珍贵的宝石之一。
2. 2.The Koinalo diamond has been sold for a record price.
   科依诺尔钻石的售价创下了记录。
3. 3. The Koinalo diamond was discovered in Botswana in 1905.
   科依诺尔钻石于1905年在博茨瓦纳被发现。