Luminous Glow In Dark Wire Wrapped Crystal Stone Pendant Necklace by GokuStore Item Specifics: Material:Copper, Crystal Color:as first picture Luminous color of green, purple, dark blue is a little similar. Longer the pendant be placed under the light, the brighter it would be. Gender: Unisex Necklace Length: About 47cm Pendant Size: About 4.2 x 1cm Weight: About 12g Package Includes: 1 x Necklace