I have 1 at home, bought in a group of other random sheds for crafts... I just can't bring myself to cut it up. It has what APPEAR to be really deep grooves and cracks but when you run your hand over them or try to dig a nail into them, smooth as oil.

I need to find something to do with it that doesn't mean cutting into it. Though the bur area is a wonderful orange so I bet it's a GORGEOUS color inside...
maybe do a design on one side, real carefully. I need inspiration.