Huge Crystal Cavity in this Septarian Egg 5"This Utah Septarian Geode Crystal Egg Sculpture has a large open and visible smokey yellow calcite crystal interior. At approximately 5" tall x 3 1 2" wide and 2 lbs. it's a perfect size for any collection and a beautiful and unique geo decor! Septarian Geodes formed in the Age of the Dinosaurs, during the Cretaceous Period! Comes with an Information Card.