Oregon Thunderegg featuring translucent clear to light brown agate with a tiny bit of banding and an even tinier central vug of quartz. The official State Rock of Oregon! From Friend Ranch, northeast of Madras in Central Oregon. Approx. 3 1/4″ H x 3 5/8″ W x 2 3/8” D; 17.7 oz. Need a stand? We have a selection of display stands here. (stand not included)