Never seen one either, assuming you have the stones, 7500 or so on average a day? Two to three million a year in gems, more with trading and a bard, etc etc?
Question is can you keep yourself supplied with smooth stones. Still fun item.
Khaladon starts to turn the crystal knob, but stops with a frightened look on his face. He begins shaking uncontrollably and flies across the room, as though by some invisible force.
**SPLAT!!** Khaladon careens off the far wall, slides down the smooth wood panelling and collapses into a quivering heap on the floor, with only his dignity bruised.