Oregon Polished Thunder Egg half

Thunder egg half sourced from Richardson Ranch near Madras, Oregon. Cut and polished in my shop. Width is 3" and height is 3". Mix of blue agate with water lines and moss. Almost looks like a painted underwater scene!

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.