Geode Key Ring. A Geode is a spherical rock which contains a hollow cavity lined with crystals. This Half Geode reveals its inner sparkly contents. Open Face is Smoothed to Prevent Snagging when in a Purse or Pocket. Geode is About 1 3/4 Long by About an Inch Tall. Connector to Metal Key Ring is Anchored into Geode. Made by a Local Artist who Cracked the Geode, Polished the Surface and Anchored the Key Ring. Very One of a Kind.