My dad's chemistry professor had oneof those. He could put it against a geiger counter and set it off.Originally posted by: shuttleteam
Folks these have VERY MINUTE amounts of activity. An old radium dial watch is much hotter!
The green pix are taken showing fluorescence in the presence of longwave (UV-A) light.
These marbles have a urine yellow color to them in daylight. Quite boring!
Originally posted by: marvie
It looks pretty cool..but would it kill my lil' boys if i put them inside my pants' pockets?
Isn't that the strip from a fire detector?Originally posted by: Bootprint
And this auction is dissing the marbles for not being radioactive enough.