This is a very thin well made blade. It looks like the base is the original shape of the worked material and doesn’t appear to be broken to me but I could be wrong. This piece was purchased as part of a collection in the 1960’s.
This Archaic Period point was crafted into a tool of some sort at a later date than originally made. It was beveled on opposite sides to give it a scribe type of appearance. The later work has nice patina also but it is unlike the original point.