Double-celled Utah Dugway geodal thunderegg that contains drusy quartz in one cavity and chalcedony/agate in the other with just a hint of drusy quartz. There is also a small calcite nestled safely in the back of one cavity of one half. The thunderegg was opened into two halves with a soil pipe cutter and the edges are not polished. Price for the matching pair is $15.00 plus shipping.