Egg of something?

[jungliston1]

Hello all, wondering your thoughts on this piece. It looks to of been broken in half at some point in its history. Tha k you for the help.
Edward M.

 

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[Kray Gelder]

It's not an egg. It looks like either an agate geode or chert nodule that has been river-tumbled.

 

[Joe G from Md]

I'd say agate!

 

[old digger]

I have to agree that it is a chert nodule.

 

[Whiplash016]

It’s a chert nodule