Made of 925 sterling silver, hypoallergenic, nickel-free and cadmium-free. The workmanship is very fine, it symbolizes enthusiasm and happiness and can bring good luck to people! It appears light blue in sunlight, like the faint light of the moon. Moonstone radiates a mysterious atmosphere and looks very beautiful when worn with earrings. Color is subject to the actual product received. Jewelry Care: To better care for your earrings, remove them when swimming, showering, or doing other water-related activities. If your hypoallergenic earrings accidentally get dirty, you can clean them with a clean polishing cloth. Then put it in a soft cloth bag or gift box to prevent it from rubbing with other jewelry.