I guess if some ol' neanderthal picked up a real good skippin' rock , chucked it and hit a mastodon between the eyes, you could call that skippin' rock an artifact. Matter of fact if you use your imagination you could make an artifact out of every rock you pick up. Reality is those finds of yours could have very well been used as an intended tool or weapon,but artifacts that are identifiable usually cannot be mistaken because they are usually a work of art or they show signs of heavy use. I'm going to have to agree with that ol'relic from Alabama and say,without more conclusive pictures, they are just a couple of rocks! But you know if you think they are sure enough artifacts,that is all that matters. Stay in the hunt and best of luck!!!The Kid