Here are some more of them. Idaho is known as "The Gem State."

VOA: special.2009.08.09

But we understand that what happens in the church part of the Catholic Church might be different from what happens in the basketball gem that the Catholic church builds.

但我们知道,在天主教的教堂中所发生的,可能不同于,在天主教会建造的,篮球场上发生的事情。

普林斯顿公开课 - 人性课程节选

It's not as popular as Central Park. But I feel like it's kind of a hidden gem.

它并没有中央公园有名。但我觉得它是一枚被隐藏的瑰宝。

纽约的公园 - SpeakingMax英语口语达人

Milton has dug up a gem from the pages of The Iliad, and this gem has something like a Medusa effect on the poem or perhaps on us as readers. Time almost seems to stop when we begin appreciating this image solely on aesthetic grounds.

弥尔顿从《伊利亚特》中挖出了一块瑰宝，这块瑰宝对于诗或我们读者起得作用,如同美杜莎一样，在我们只欣赏着,精美绝伦的地面上的场景时，时间仿佛停止。

耶鲁公开课 - 弥尔顿课程节选