interesting rock??

[musky44]

found this today. its 2 inches long 2 inches tall and 1 inch thick. its polished on the bottom and one side. the rest of it has a rough texture to it. i have nothing to compare it to. i was thinking maybe a grinding stone of some sort. like to hear your opinions. thanks

 

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[unitas]

It appears to be a hammer.

 

[The Grim Reaper]

That's a Hammerstone and a very nice one at that. I usually don't bring those home much anymore, but that one I would have brought home with me.