Thunder Eggs have some of the most interesting fortification lines. This 5mm is no exception as it contains blue tinted clear agate, white Common Opal, and very dark to black tinted agate in the shape of a canyon. A high dome cabochon gives this gem room to voice its thunder and the Keum Boo (23.5k Gold and Fine Silver) adds the lightning to the show. An 18 gauge Sterling Silver ‘open format’ band holds this scene to your 6.5-7 sized finger.