I found your website very interesting, I recently found what I believe was a native american stone tool, I have attached a few pics of it. I am wondering if you could give me some idea of what it is.  I have looked on several sites but have not seen anything like it. it is made of white rock and is shaped to fit your hand, and is ground to a point on the end.  I could see it as some time of scraper but I am unsure.  I found it on my land in central texas, we ahd been bulldozing cedars when i noticed it on the ground, it appears that it may have trace amounts of quartz in the white rock.
 
Any help you can give me would be appreciated.