Septarian half with visible Turritella Fossil remnantsSeptarian half with rare turritella fossil visible on the stunning lap polished face and another can be seen on the back unfinished side. Has a beautiful calcite and aragonite pattern and small calcite crystal hollow making this a unique and rare piece! Approximately 1 1 4 lbs., 4 1 2" in diameter and 1 1 2" thick. Comes with acrylic stand and information card. Give a Gift from History. Septarian Geodes formed during the Cretaceous Period (66 to 145