This magical glowing necklace made with moon & stars miniature, black pigment, high quality environmental & safe glowing powder & resin. The pendant needs exposure under light or sun to glow. You have to charge pendant by holding it under the light (15 minutes under the sun; 30 minutes under the lamp) before you wear it in the dark. ITEM DETAILS Crystal length: approx.6 cm/2.4 in Chain length: approx.50 cm/20 in Please let me know if you need a shorter or longer chain. Glowing Moon & Stars Crystal Necklace, Point Crescent Pendant