When they make granite countertops they saw the roughly 6x10 foot slabs of 1-1/4 inch granite into pieces on a big saw with an overarm and a table. They get chunks they can't do anything useful with. The yard I visit is littered with them.
I bought a cheap tile saw and it churns through this granite amazingly well.
If you don't care what *color* your machine is, or that it is made from different color pieces, you could homebuild all kinds of stable structures from these chucks and a cheap saw. When it's all done, you could paint it, I suppose, but that would ruin the beauty of the stone.
Doug Goncz
Replikon Research
Seven Corners, VA 22044-0394