Broken Native American artifact?

[coinman123]

I was metal detecting and thought, "It would cool to find a Native American artifact." Then I looked down and saw a strange stone that appeared to be worked on a while back. The place I was metal detecting had Native Americans living there, and is named after Native Americans. Anyway, do you think it is Native American?



Thank you,

 

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[olroy70]

Part of a grindstone.............

 

[coinman123]

Is it erosion?

 

[coinman123]

Is it erosion?

If not what tribe is it from

 

[coinman123]

One side is fairly flat.

 

[coinman123]

Here is a picture of the side