One Gram of Autunite in a Sealed Vial Locality: From Huantai County, Zibo Shandong Provence China Autunite contains 48.27% uranium. This specimen will glow bright green in the presence of UV light due to the presence of phosphorus. A small UV light source is included with each vial. Not recommended for use in cloud chambers as the glass will block most of the observable particles. The size of each vial is 37.5mm tall by 15.4mm in maximum diameter. Each vial has been sealed closed using epoxy for safety purposes. Attempting to open the vial is not recommended. The buyer must assume responsibility for this item and use it according to its intended purpose. Keep this away from children and store it at least three feet from anywhere anyone spends a lot of time. Geiger counter not included.