Nope the group buy forum was purged, and my notes about the costs are gone. If I recall correctly, and that's a BIG if, we had to purchase either 50 or 100 lbs of "stone", and it had to be all the same color. They would send us a big blank that would need to be cut up and it would make a LOT of blanks, and they'd wind up something like $3 or $4 a piece. The prices may have changed since then (it's probably been about a year).