Ancient Native American stone tools -- what were they used for?

[ldhummingbird]

the non-flint one looks like a hand millstone. the one right after it might be a scraper for cleaning skins? however I think the guy before me seems to have more knowledge of such things than I do.

[pyrolytic]

0:02 on video, hand "chopper".

0:19 hand held grinding stone; it might even fit in your grinding bowl!

0:49, hand or hafted chopper/axe.

1:24, Probably indian trade "preforms"; which with further flintknapping, could be made into likely arrowheads...all very worth keeping of course. I'd suggest you throughly hunt your property for everything...and keep the collectors out.