I will have to say this on the heat treating of stone. As a norm. you want find heat treated Beaver Lakes, but try this just for a thought, a NA is sitting around their fire that has been in the same spot for a few days and the heat from the fire pops open a rock, then later on they see this color stone and pick it up and knapp it. This could happen and I would say it did, but just not a lot at all. The stone in question does have a heated look, but it also could be the iron content in the stone that gives it that look. The only way a person would know for sure would be to take a piece of the raw stone and heat it to around 500-600 deg. and then compare it. All stone acts different when it is stressed in one way or another.
Mogi I'm not trying to start a argument but on your comment that there is no way anyone can apply that much patina you are wrong on that. If I can get the time I will do a reproduction with applied patina and show all the stages of the point along with some microscope photo's just to prove this, but I will do it on another post and at a later date. This is one thing that may help your posting of artifacts and most of the folks on here go by this. When you post an item most folks put all the info on that item in the post that they have like when, where(like state and county), who found it and a photo of the find when you found it is great and goes a long way. JMO