Not doubting the one you have, Destry; just wondering about the one I have. The little town I stay in when I'm in Sask. has a local history Museum with lots of these nutting stones along with the grooved axes and grooved hammer stones they find around the local buffalo jumps. My nutting stone looks just like the ones in the Museum, but I still wonder; shoot, there aren't even any nuts up in that area that I know of...Geo