Radioactive Uranium Ore - available in granulated or chunk form. Sizes as shown. Vials contain Uraninite, Pitchblende, Carnotite, Gummite and a wide variety of other primary & secondary ores. Each vial is different and may contain any combination of ores, but all contain the most common ores of Uraninite, (Pitchblende), Carnotite and Gummite. Perfect for experiments in Uranium extraction, Cloud Chamber sources, laboratory experiments involving Uranium or as an inexpensive Geiger Counter Test source. Inexpensive, and you get a much more interesting variety as compared to buying a single piece of Uranium ore. Vials are certified and come with a Certificate of Measured Radiation.