Nutter

[Node]

 

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[pepperj]

Very nice
Called a cup stone/fire starter as well?

 

[quito]

More than likely an Omar.
https://en.m.wikipedia.org/wiki/Omarolluk

 

[Treasure_Hunter]

Sorry, that is an Omar not artifact.....

 

[unclemac]

notice how the interior of the hole is concave

 

[The Grim Reaper]

Sorry, but that is natural.

 

[Node]

I do believe you are correct. There is no edge wear and the inside still bears the host rock outlines.