Super Bright Glow Pebbles - PurpleThese magical pebbles store light and glow with a soft, gentle purple shimmerno batteries needed! Made with a special resin blend, they look and feel like real pebbles but are waterproof, drop resistant, and non toxic. For best results, charge in direct sunlight for 8 minutes or under a UV black light for faster activation. (Indoor lamp light will not charge these stones.) Crafted with premium strontium aluminate, the brightest and longest lasting