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
Metal Worn –Titanium Organic Mini Sword Pendant - Metal Worn -
Tritium Pendant 1 (All Materials) (BHY6BTW92) by Tofty
Tritium Glow Pendants - Glow for decades – TritiGlow