The Red Hill Bed, located in Malheur County, Oregon, is a well-regarded thunderegg site known for producing nodules with warm, fiery interiors. Thundereggs from this bed often contain agate in shades of red, orange, amber, and gold, sometimes accompanied by moss or plume inclusions that add intricate detail. The rhyolite matrix is typically reddish and coarse, with eggs that are solid, medium to large in size, and excellent for cutting. Red Hill material is popular among collectors and lapidaries for its bold coloration, high polish potential, and the strong contrast between matrix and agate center.
Rocks of the Cascades – Thundereggs, Tools & Tradition