G26699 - Radioactive Uranium Glass Colorful Swirl Marble + UV LED & Battery
Radioactive and very unique marble contains Uranium glass. This marble glows brightly and colorful under the UV LED that can be illuminated with included coin battery. The marble is slightly radioactive and can be detected by a Geiger counter with SBM-20 tube or our C8092 Geiger Counter (Geiger Counters sold separately). Set includes 1 unique marble, (1) 10mm UV LED and (1) CR2032 coin battery. Note: Just slide LED onto battery with long lead on (+) of battery and short lead on (-) of battery to cause it to glow!