Agatized fossil or just a weird rock?

[Rory]

Hey Friends,
First time poster here. Wondering if this is some kind of bivalve that was exposed to extreme heat or just a really cool formation? Thanks! ~Rory 😊

 

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[T.C.]

 

[Madmox]

Hey Friends,
First time poster here. Wondering if this is some kind of bivalve that was exposed to extreme heat or just a really cool formation? Thanks! ~Rory [emoji4]

Looks like a rock similar to chalcedony. I don’t see any hallmarks of it being fossilized. And I doubt a bivalve, at least the fleshy part, really would fossilize. It’s too delicate to handle the pressure.

 

[old digger]

Welcome to tnet!

I believe your item is a quartz agate.