Caveman, I got it on a trade and one piece is as big as a basketball and the other one about half that size. I made these from the smaller piece that is now about the size of a softball. The guy I traded with said he can get more if I want it. It comes from Wilkes County, NC.
The flake scares are hard to see in a picture unless the lighting is just right, but they are knapped pieces.
Thanks for the comments from everyone.