DescriptionYou would fall in love with this Necklace. If there are often exposed to sun, it will glow in the dark, if stay in a dark place for a long time, it will stop shining, you may beam it with your mobile phone lamps or the sun, it will have a bright light again back to the dark, Because of the exposure time is different, the brightness may deep or shallow, so the more light is absorbed, the brighter it appears.Features- Color: Blue-Green. - Material: Copper. - Size: 45+5cm(Chain Length). - A Must-have Item for Holiday and Everyday! With it, You will look more charming and attractive. - After absorb the sunshine, flashlight or phone flash, the necklace will shine in the dark. - Perfect Gift For Christmas Day, Anniversary Day, Valentines Day and Birthday to Your Girlfriend, Wife and Kids. - You would fall in love with this Necklaces. And It's Great gift for everyone even yourself.