Bruneau Jasper set in 18 karat white gold-plated Sterling silver setting. Measures 2-1/8 inches long by 1-1/8 inches wide at widest point.
Bruneau Jasper is not actually mined in Bruneau, its namesake town in western Idaho, but close to the Bruneau River. Bruneau Jasper is a member of the fine jaspers with extra smooth finishes. Other members are Imperial Jasper, Morrisonite, and Blue Mountain Jasper. Bruneau Jasper is within a Rhyolite flow that covers a little more than an area 100 square miles.