This is a fine Missouri Etley Point. It measures 4-13/16" in length. (it's a WHOPPER!) Beautiful beige Chert. This big authentic artifact is excellently made. Great edges and tip! It does have one stack triangular in shape you can clearly see in t the pic. Great patina! Great piece!!! Etley Points are from the Late Archaic Period 4000-2500 before present.