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 [=are from the distant past; are very out of date]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.
(..) Euron! Euron! May Euron, your servant, be born again from the sea as you were. Bless him with salt. Bless him with stone. Listen to the waves. Listen to the god. we shall have no king but Euron Greyjoy. Let the sea wash your follies (..)2016 TvShow: Game of Thrones Title: The Door Season: 6 Episode 5