✅ SOLVED Now I know, Its a Grinder.

[rock]

I took this to have another person look at it. I have been told twice by 2 different people now and I am going with the odds 2-1 that this is a grinder and not a nutting stone. I thought is was kinda small to be a nutting stone. It measures 2.5 inches on each face.
Im still nutting stone free to date. This is a Grinder like a Mano but square.

 

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[monsterrack]

I'll go along with that, great find