Thunder Egg Polished Half
Thunder Eggs form when silica-rich lava cools and traps steam and gasses that form bubbles. Minerals, like silica, form around these bubbles and crystallize. Over time, silica and mineral-rich water seeps in to fill the void and hardens, creating the beauty inside thunder eggs!
Thunder Eggs may have a rough and dull exterior, but you can never judge a book by its cover!