[whswhs]

Stone weighs somewhere in the neighborhood of 160 pounds per cubic foot. So you'd be moving a cubic foot at a time.

It's also doubtful that you'd be able to do anything with a large block of stone. I'm not sure if you can use Control to break off single cubic feet of the relevant material, especially if it's a rigid solid. If the stone is already fractured into small chunks, you'd be fine, but not if there's a massive stone wall.