Unusual Red and Green Opal Butte Thunderegg

Identified (though not guaranteed) as an Opal Butte thunderegg, this is a really unusual specimen featuring a broken inner matrix. It looks like a thunderegg within a thunderegg (like the double fallen tree specimen). The inner thunderegg is (was) a perfect biconoid split but the outer thunderegg seems to have attempted a crescent split on top of it and, in the process, ripped the inner thunderegg clean in half. A really interesting stone.

4.25" x 3.75"

Image Provided by Gary Mangan.

Join the Eibonvale Thunderegg Blog to keep up with the latest news and images.