This item is not glow in the dark, they contain uranium which reacts to UV light (shown here under 395nm). Background radiation is around 20-50cpm to give you an idea of how weak it is, they are perfectly safe.
Crushed Uranium Vaseline UV Reactive Glass Shards Frit Broken Pieces 5mm Graded
Hazel Atlas Eyeball Personal Ashtray 3.75" Depression Uranium Vaseline UV Glow
100pcs Vaseline Uranium Glass Beads 4mm Light Yellow AB Czech, UV reactive
Uranium Vaseline Glass 14mm Yellow UV Reactive Marbles Marble (Seconds)
Uranium Vaseline Glass Tortoise Turtle - UV Reactive
