Owyhee Jasper

Owyhee Jasper comes from the rugged Owyhee region straddling Oregon, Idaho, and Nevada, USA. Like its famous neighbor Biggs Jasper, it is a picture jasper valued for landscape-like patterns in tans, browns, creams, and soft blue-greys.

The related Bruneau Jasper, from Bruneau Canyon in the same region, is one of the most prized picture jaspers for its egg-shaped "orb" patterns and rich colors. Owyhee material more broadly shows scenic, layered banding that makes each piece unique.

It is an opaque microcrystalline quartz colored by iron oxides within fine volcanic sediment.

Owyhee Jasper formed in the volcanic terrain of the Owyhee Plateau, where ash and fine sediment accumulated and were later silicified by silica-rich groundwater. The layered deposition produced scenic banding, while iron oxides supplied the warm and blue-grey tones.

In the Bruneau Canyon area, circular silica precipitation created the famous orbicular patterns. The material is collected from canyon exposures and claims across the Oregon-Idaho borderlands, where erosion has exposed the silicified beds.

Identify Owyhee Jasper by opaque, layered scenic patterns in tan, brown, cream, and blue-grey, sometimes with green. Hardness is 6.5-7 (scratches glass); streak is white; polished luster is glassy.

It closely resembles Biggs and Deschutes jaspers; regional Bruneau material is recognized by its distinctive round orbs. Distinguish from agate by complete opacity. Soft dyed imitations are ruled out by the stone's hardness.

Owyhee Jasper, and especially Bruneau Jasper from the same region, is cut into collector cabochons and display slabs that highlight scenic or orbicular patterns. It is a staple of high-end picture-jasper jewelry.

Metaphysically it is associated with grounding and stability. Its actual value lies in the natural beauty of its landscape imagery and the renown of the Owyhee-Bruneau locality.