You can blast them with water flow to try and get them to move. If you're in a hurry to move it, you'll probably have to remove the rock and either sell it with the nem or try the cold butter knife to get it to detach. When I bought mine, they ended up just breaking the rock it was on and sending it home still attached to the much smaller piece of rock (I had no room for the whole rock). If you try to get it to detach, be gentle and do NOT tear the foot. Good luck, and congrats on the split!