The Brown Ranch, located in Malheur County, Oregon, is a thunderegg site known for producing solid, medium to large nodules with attractive agate interiors. Eggs from this location often feature earthy tones—browns, grays, and soft reds—along with mossy or cloud-like inclusions and occasional fortification banding. The rhyolite matrix is typically coarse and tan to reddish, providing a strong contrast when cut. While not as widely publicized as some other Oregon thunderegg beds, the Brown Ranch offers reliable, high-quality material appreciated by lapidary artists for its polishability and natural variation.
Rocks of the Cascades – Thundereggs, Tools & Tradition