Found today in Calhoun county. Ive never seen one like this. It's beveled only on one edge per side. It seems as If it might make it spin in flight. Not sure you can tell from the pics
Here it is, Southerman. It`s a fine Bolen Bevel, made from chocolate swirl Coastal Plains chert. One of the quarry sites for this particular material is about 5 miles from my house.