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 [=are from the distant past; are very out of date]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.
(..) - "Exium, who was sentenced to turn for eternity." Erica: Okay. "Carved in stone, words deep and bold. Thou must grant the wish last told." - Trent: Oh! - Josh: Oh-ho-ho! (..)2009 The Black Waters of Echo's Pond