Our jewelry are made of genuine high-grade material, as long as the proper maintenance, ensure wearing years still bright as new. We strive to provide our customers cheap and cheerful products. You needn't worry about losing money because we offer 30-day money back guarantee or exchange for all products sold by us. they don't need to use very expensive maintenance water, just to avoid acid-base and moist environment. Humid conditions include: don't wear when shower, washing face, sweating, deposit before application of dry cloth to wipe dry; when jewelry don't wear should be placed into the box which has desiccant inside.