A single Oregon Thunderegg half that I hand collected, cut, polished and set on a Brass finial base (1/4-27 threaded).
The finial, stone included, is 2 1/8 inches tall.
Thundereggs are formed in Rhyolite flows in a very similar manner to the more commonly sold crystal geodes but are typically solid. This specific stone came from the collecting beds at Richardsons Rock Ranch in Madras Oregon.
