Madras Oregon Thunderegg – Agate & Quartz Geode Rock
This genuine thunderegg from Madras, Oregon is a collector’s favorite, formed in ancient volcanic rock and lined with beautiful agate and quartz. Each natural geode is unique, featuring colorful banding, crystal pockets, and chalcedony patterns. Perfect for rockhounds, geology lovers, and mineral display
collections.
Engraverd maple stand and tent card describing the origin of the thunderegg is included.