New to forum. Found this today

[zues]

Any idea what these might be?

 

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[arrow86]

The first pic is interesting .... Could you post more pics... Dose the groove run all the way around and does the flat end look broken? It could be a pestle but it almost looks like a grooved hammer stone. I found o e with a round back like yours and than had a nice axe head on the other end.

 

[zues]

The grove runs almost all the way around. Hard to tell if the flat end has been broken. Found in northern Minnesota if that helps any.

 

[fyrffytr1]

Can you post a side view of the round piece? Or, is it a ball? Not that I know anything about it but it might help someone here ID it?

 

[jmaschal]

Looks like a pestle to me

 

[zues]

Side view of the round piece. And another piece my grand father found years ago.

 

[The Grim Reaper]

The round stone looks natural to me. The grooved piece looks like it may have been that start of an Axe that was never finished or it's a Grooved Maul. Can't really say for sure from those pictures. The last piece your grandfather found is most likely a natural Concretion.