stone

See:

a heart of stone a stone's throw be carved in stone break balls carve in stone carved in stone cast the first stone Constant dropping wears away a stone get blood from a stone

get blood out of a stone hard as a rock have a heart of stone kill two birds with one stone leave no stone unturned People who live in glass houses shouldn't throw stones rolling stone gathers no moss run into a stone wall set in stone

sink like a stone Sticks and stones may break my bones sticks and stones may break my bones, but words will never hurt me stone dead stone sober Stone the crows! stone's throw away within a stone's throw You cannot get blood from a stone