Is there such a thing as a rock with a lot of good bilateral symmetry with no radial symmetry except a fossil.
It seems indicative to me that this is a good indicator of some types of fossil.
I have studied a lot of rocks, and have never seen such a thing.

Okay, this is pushing my "college knowledge" from 20 years ago, but what about a Geode?
My parents had Two of them, polished, and I think I saw bilateral symmentry in those. But I am not a geologist, and they won't let me play on on T.V.:)

Got a photo?

Wouldn't pretty much any crystal point display bilateral symmetry?