Here's some pottery fragments I've glued together and made frames for. The first two frames are 10" X 12" and the other is 9" X 14" (inside diameter). I used Titebond II wood glue on the pottery and 10 gauge insulated aluminum wire for the brackets.
No! It looks like some of it was sheared off--it's flat undereath! Everywhere else, however, it looks ground and maybe pecked and ground. I think it's granite.
Nice those are the kind a novice hunter would pass over in search of those nicely formed points. I’ve got the opposite problem I’ve got a healthy collection of “probably just rocks”