[oregon conservative]

Thunder eggs are rocks thrown out of volcanoes as part of an eruption, not rocks struck by lightning. Interesting thought though.

[Shooter 2.5]

I was wondering what they were. I had a job in plating material and one of the problems we had was when we raised the heat too fast and the metal would "spit" at the material leaving little microscopic balls called Nodules. I have been in art galleries when these volcanic nodules were split open to reveal crystalized colored metal within the hollow core.