Extra Large Polished Succor Thunder Egg half

Thunder egg half sourced from Succor Creek near the Oregon and Idaho border. Cut and polished in my shop. Width is 5.5" and height is 4.5". This is a thunder egg that will get some attention! Light blue agate with white waterlines fills this egg and is surrounded by the red/brown shell.

Thunder eggs are nodule-like rock, similar to a filled geode, that are formed within rhyolitic volcanic ash layers and no two are alike. Thunder eggs are the Oregon state rock and personal favorite of mine.