Septarian Nodule shaped into an Egg with rare barite crystal insideThis Utah Septarian Geode Crystal Egg Sculpture has unique and rare barite crystal structures inside the yellow calcite crystal interior. At approximately 4" tall x 2 1 2" wide and 1 1 2 lbs., it's a perfect size for any collection and a rare and unique geo decor! Septarian Geodes formed in the Age of the Dinosaurs, during the Cretaceous Period! Comes with an Information Card.