I have a scintillator that will pick up a small piece of uranium ore from several feet away. I just checked some Rb lamps and cells and got no response. Every single fireplace that I have checked sends the scintillator off into clicking heaven. Apparently firebrick is rather hot stuff in more ways than one. I have some uranium glazed pottery that is less active. The guy that lived behind us when I was a kid was a geologist. His living room coffee table was a chunk of yellow uranium ore about 36x36x18 inches with a piece of glass on top... he had discovered a very large uranium deposit and kept a "souvenir" for his living room. ----------------- > fog photographic film in 1 to 2 months but that is also the case >with unprocessed uranium ore so I would not worry about it at all