Is this considered a Thunder Egg?

[cwaxsom]

Found one really nice one and several pieces. They have a brownish color and have fractures all over. My question is are these geodes or Thu nder Eggs?

 

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[smokeythecat]

Geodes from what I see.

 

[tamrock]

This might shead some light on what a thunderegg is. Very often when it comes to the names of rocks there seems to be always more than one, but I'd also call the one you posted a geode
https://en.m.wikipedia.org/wiki/Thunderegg

 

[A2coins]

Pretty cool find

 

[Tuberale]

Definately a geode.

 

[mrs.oroblanco]

Geode is is a simple term for a rock with a hollow in it. So, you can call it a geode. It does look like a thunder egg - we have thunder egg hunters on one part of our property in Arizona, and they quite often look like this.

Mrs. O