Crude Material artifacts?

[Headhunter23]

I have a few pieces that I am unsure about it. The first pic is of stuff definitely worked. The second pic is of pieces I picked up but am unsure if they are just rocks or actual pieces used and worked by Native Americans. The majority of the stuff I find from this site is very rough and crude material. They look like just rocks to me but I thought I'd ask others opinions. Thanks.

[uniface]

When crude materials were all people had to use, they used them.