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 [=are from the distant past; are very out of date]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.
(..) the cop and me. When you guys walked in, he was gonna kill you and run with the diamonds. What'd I tell ya? That sick piece of shit was a stone-cold psycho. You should've asked the cop, not just killed him. He talked about what he was gonna do when he was slicing him up. I don't buy it. (..)1992 Reservoir Dogs