counting of gemstones

例句：

1. 1. The jewelerwas counting the gemstones in thedisplay case.
   珠宝商正在检查展示柜中的宝石。
2. 2. The museum had a special exhibiton the history of gemstones.
   博物馆有一个关于宝石历史的特别展览。
3. 3. She countedthe stones carefully to make sure they wereall there.
   她仔细地数了数石头，确保它们都在那里。