Nutting stones and mystery item

[Scenario84]

I found two Native American nutting stones creek hunting today, as well as this mystery item, can anyone help identify?? It's stone, ground down and smooth

 

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[Tnmountains]

First welcome to t-net. I think the stones may be geo facts or natural. They look like they should be something but are not.Mother nature does that. I could be wrong. They have a native american section here and they can tell you for sure. If you want let me know and I will help you move it over to that section.
Welcome aboard