NA Artifacts or Rock Garden Items?

[OntarioArch]

Acquired from Old Timer's collection, where he had authentic treasures AND field rocks AND modern reproductions ! Challenging.
These two sure look intentionally smoothed and shaped, but who knows? I can't find an image anywhere of similar items. Are they artifacts, and what would they have been used for? Thank you!

 

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[Tdog]

I don't see evidence of human alteration so I believe they're natural.

 

[justonemore]

Agree, look like water worn beach rocks.

 

[OntarioArch]

.....away they go..............................................