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 [=are from the distant past; are very out of date]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.
(..) was insatiable. So the heathen gods placed upon the gold a terrible curse. Any mortal that removes but a single piece from that stone chest shall be punished for eternity. I hardly believe in ghost stories anymore, Captain. Aye. That's exactly what I thought (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl
(..) You don't know what this is, do you? It's a pirate medallion. This is Aztec gold. One of identical pieces they delivered in a stone chest to Cortes himself. Blood money paid to stem the slaughter he wreaked upon them with his armies. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl