id help

[Fla Gal]

This looks like coconut shell to me, But I've never seen ridges On a coconut shell.
idk

 

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[monsterrack]

Looks like part of a prehistoric turtle shell to me, cool find

 

[Fla Gal]

Hmm, I never thought of that thank you.

 

[rock]

Looks natural to me. But it is always better to ask than to ignore it. Looks like sandstone to me.