Necklaces I make using a real nuclear radioactive isotope called Tritium ,(H3). Glows constantly for ten years. Yes it's safe. I've had one on for five years. : r/crafts
Isotope Triode Fob | TEC Accessories
Reserved listing - please don't buy tritium light, Glow in the dark necklace, Purple glowing pendant, Steam punk jewelry | Steam punk jewelry, Tritium, Dark jewelry