The Key Glow In the Dark Necklace Jewelry Pendant Steampunk Fairy Magical When fully charged our pendants will glow brightly for the first hour Miniature Key shaped - Glow In the Dark Necklace with 19" necklace. Exclusively sold by - Cute Glow Jewelry TM Heart shaped pendant which shows a unique, gorgeous glow in the dark. The key shaped pendant glows brightly in the dark.