I found those arrows in a trip to Austin Tx. I just want to share this image. The arrow that look polished was found on Lake Travis and the others on the Hill Country. Enjoy
Both sets of grandparents and mother are from the hill country (Uvalde, Leakey, Voca). 4 relatives were Texas Rangers in the 1800's. One of them, Capt. William S Banta wrote a book on his adventures. Grandparents had quite a few arrowheads from there.