His political ideas are from 'the Stone Age'. [=are from the distant past; are very out of date]
Their lawyer said that he would 'leave no stone unturned' in trying to find more evidence.
The researchers 'left no stone unturned' in their search for the original documents.
(..) But if we go to the capital, we'll go with two armies, we'll go with three dragons, and anyone touches you, King's Landing burns down to the foundation stone. And right now she's thinking of how to set a trap. Of course she is. And she's wondering what trap you're laying for her. (..)2017 TvShow: Game of Thrones Title: Beyond the Wall Season: 7 Episode 6