Now is your chance to own a piece of Earth history and a good way to test if your Geiger counter or other radiation detector is working. Contains 0.1 grams of Natural Uranium Dioxide, Natural ratio (U235 0.7%, U238 99.3%,Trace of U234) the same type of unenriched uranium that is burned in Heavy Water nuclear reactors!

• Approximately 70nCi radiation (2590 Becquerels or 2590 decays per second) 
• Releases Alpha, Beta, and Gamma Particles - Disk Measures 1 inch in diameter and 1/8 inch thick
• Uranium is sealed in Epoxy for safety
• Disk Measures 1 inch in diameter and 1/8 inch thick
• Radiation is Dangerous so please be careful when using, handling and transporting this disk. Keep it out of the reach of children, as it is also a choking hazard!

Available for purchase by US residents only