These are not glow in the dark, they contain uranium which reacts to UV light (shown here under 395nm). Background radiation is around 20cpm to give you an idea of how weak it is, they are perfectly safe.
Uranium Vaseline Glass Block 50x50 mm Uranium Yellow Glass Statue Art Deco
Uranium Vaseline Glass Yellow UV Reactive Shot Glass - Gloss
VINTAGE Art Deco Uranium Vaseline Glass Perfume Bottle w/ Stopper | Glows UV
Beaumont EAPG Circa 1901 Large Hand Painted Sugar Jar Uranium Vaseline Glass
Uranium Vaseline Glass 14mm Yellow UV Reactive Marbles Marble (Seconds)
Uranium Vaseline Glass 12mm Yellow UV Reactive Marbles Marble (Seconds)
