eco-friendly material, nickel free, lead free,never faded high quality material with long lasting Platinum plating & Gold plating. make your fashion life happy and beautiful Standard:pass us standard test or european test as requirement. Occasion:perfect gift for any occasions that will surely make a memorable impression Pendant Size: 21 * 15cm Chain Perimeter: 45cm Notes for Your Heart Necklace: 1.Rub it with baby wipes: they perform miracles on jewelry. 2.Then rub with a clean dry soft cotton cloth to bring back the shine. Put it inside a soft cloth pocket or fabric swath, avoid it from rubbing against other jewelry. 3.To better maintain your Heart Necklace Birthstone Diamond Pendant Necklace, please take it off when you swim, take a shower, or other action involved in water.