precious stones 宝石
kidney stones 肾结石
stepping stones 垫脚石
corner stones 基石
A: Look at these beautiful stones on the beach!
A：看海滩上这些漂亮的石头！
B: Yes, they are very unique and smooth.
B：是的，它们非常独特且光滑。
1) 石头，石块
2) 宝石
3) 结石
1. 石头，石块
2. 宝石
noun
1. Hard, solid mineral matter of which rocks are made.
2. A precious gem.
Synonym: rocks, pebbles, gems