Columbia Basin Agates, found throughout central and southeastern Washington, are prized for their subtle beauty and natural polish from centuries of tumbling through ancient river systems. These agates typically form as small, rounded nodules with translucent to milky white interiors, often banded or clouded with soft grays, blues, and warm honey tones. Many show faint inclusions or internal fractures that reflect light in interesting ways, making even the simplest pieces visually appealing. Commonly discovered in gravel bars, hillsides, and dry washes where the ancestral Columbia River once flowed, Columbia Basin Agates are a favorite among rockhounds for their accessibility, natural charm, and understated elegance.
Rocks of the Cascades – Thundereggs, Tools & Tradition