What is my rock?

[Dyluxtier]

Anyone have an idea of what this rock is? I found it in a river in MN.
Thanks for the help.

 

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[NJearthman]

Dinosaur gastrolith. https://en.m.wikipedia.org/wiki/Gastrolith
Why not? It’s fun to imagine.

 

[DDancer]

I'd consider it a butter scotch jasper.

 

[Dyluxtier]

Thank you.

 

[fuss]

Chert.