Artifact or Rock

[Indywin2016]

Found this in a stream don’t know if it’s a artifact or just a rock. Can anyone shed any light on this? Thank you.

 

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[Tdog]

A very interesting rock but it looks natural to me. I'd keep it.

Edit: Can we see some more views (top, bottom)? Sort of resembles an insulator.

 

[quito]

Welcome to the forum,

I gotta say it’s cool, but Natural though.

 

[IMAUDIGGER]

Ancient Yo Yo

 

[The Grim Reaper]

More pictures from several different angles would really help. Can't tell much from that one picture but my gut says natural.