We use the word "stone" for material and objects that have hardened over a very, very long period of time. The word "stone" is similar to the word "rock."
A stone can be large or small.
Stones can be used for decorative purposes in landscaping and architecture.
Gemstones such as diamonds and rubies are very old and extremely valuable.
The Stone Age is a period of human development in which people used stones for tools and weapons.
There are some expressions and proverbs in English that use the word "stone."
Sticks and stones may break my bones, but names will never hurt me. (Words can not hurt a person physically.)
A rolling stone gathers no moss. (A person can benefit from constant movement and activity.)
He killed two birds with one stone. (It’s good to get two things accomplished with one action.)
We shall leave no stone unturned. (We will do everything possible in order to find out what happened.)
Let he who is without sin cast the first stone. (From The Bible, John 8:7. If you are ready to punish someone for a crime, examine your conscience and consider what sins or crimes you are guilty of yourself.)
People who live in glass houses shouldn’t throw stones. (If you say or do something negative towards another person, you become vulnerable as that person may respond in a similar fashion.)