Please understand that myself and others are sincerely trying to help you figure out which are artifacts and those that are not. It is fustrating at times, but look for signficant working on the object. Here in Montana I find a lot of material that has some minor flaking that was caused by natural occurances. Look for consistent flaking that is in a uniform pattern. You may want expand your knowledge by reading books and find someone in your area that can give first hand wisdom. I sincerely encourage you and wish you the best in finding some awesome artifacts. Good Luck!