Devil’s Gate Bed

The Devil’s Gate Bed, located in Malheur County, Oregon, is a remote and visually impressive thunderegg site known for producing nodules with dark, moody agate interiors. Eggs from this bed often feature deep grays, smoky blues, and occasionally purples, with fortification banding or mossy inclusions that give them a dramatic, stormy appearance. The rhyolite matrix is typically rough and reddish-brown, and the nodules range from medium to large in size. Devil’s Gate thundereggs are favored by collectors who appreciate bold contrast and darker tones, and they often reveal striking detail when sliced and polished.