Welcome to tnet! You are on the right track as to finding the artifacts that have been worked. As for your item in question, it is difficult to properly identify a point without the base. That is a really nice start and I would suggest that you continue to search that stream and the area along the bank also if it is farmed.
Welcome in. Thank the Great Spirit we have a new collector that already has THE EYE!! No more rocks YAY!!!!?