Biggs Jasper, found near the town of Biggs Junction in north-central Oregon, is one of the most iconic picture jaspers in the world. Renowned for its intricate, landscape-like patterns and warm, earthy tones—ranging from tan and gold to deep brown and blue-gray—Biggs Jasper formed from volcanic ash and silica-rich sediments laid down in ancient lake beds, then compressed and altered over millions of years. Its scenic banding often resembles desert hills, rolling dunes, or distant horizons, making it a favorite among lapidary artists for cabochons, slabs, and display pieces. With its unique geological history and natural artistry, Biggs Jasper remains a highly prized and collectible material in the world of agates and jaspers.
Rocks of the Cascades – Thundereggs, Tools & Tradition