Mahogany Mountain Jasper, found along the Oregon–Idaho border near the Mahogany Mountain volcanic complex, is a bold, colorful jasper known for its deep reds, rich browns, and striking contrast patterns. This material formed from ancient silica-rich volcanic flows that solidified into dense, finely textured jasper, often displaying sweeping bands, brecciation, or orbicular inclusions. Its warm, earthy palette and strong structure make it popular for cabbing, carving, and display. Mahogany Mountain Jasper is especially prized for its intensity of color and the natural variation that makes each piece visually unique.
Rocks of the Cascades – Thundereggs, Tools & Tradition