I spent an hour in a favorite field and thought this was a flake when I picked it up. If you look closely, this view shows some flaking of the bottom edge and some serration of the top edge:
The back reveals almost nothing, just that this is a simple retouched flake. It is made of argillite.
A slight stem on the right and a slight staining from top to bottom help show how this might have been hafted. The serrated edge is still sharp. As it goes, I picked this up a few feet from where I found another very simple stemmed point.