It is a hand held tool of some sort for a right hander. I will suggest using thinner to my friend and see if any stain comes off. It looks like a nice original dark patina to me but, I really know nothing about artifacts. He says this was found by someone in the Alabama area of the country.
I was at my friends house and was showing him my Grandpas collection that is up for sale via proxibid and ending this weekend, he pulled out his finds and asked me what I knew about them. I told him I would snap a few photos and upload them to the internet for the experts to look at. I will get some more photos of the rest of his finds he has questions about. He does not want to sell it, he just wants to know what tribe might have made it and what it is called. It fits perfectly in the hand and could be used for a number of things, like cutting wood, a hand held weapon, etc..
Here is a link to my Grandpa's auctions that end this weekend in case anyone would like to see what he accumulated over 30+ years of collecting.
https://www.proxibid.com/asp/catalog.asp?aid=85634&ipp=100&sort=0
My family really did not want to sell them because my Grandpa took great pride in the collection, but it is just to hard to split them up not knowing the actual values so my mom and her siblings decided the best thing to do was sell them at auction. I am hoping to win the clay pipes because I helped him find one of them, I never found an arrow though

He had an eagle eye when it came to finding them. He was located in a prime area for searching and traveled the state walking many of different fields.