Material: Environmental-Friendly Alloy + Artificial Crystal Alloy jewelry, as long as properly maintained, will remain shiny and new for a long time This type of jewelry does not require using very expensive maintenance water for upkeep; just avoid acid, alkali, and humid environments. Humid environments include: not wearing while bathing or washing face, not wearing when sweating heavily. Before storing, wipe dry with a dry cloth; place 1 desiccant in the jewelry box where jewelry is stored. Our products are quality guaranteed; if there are any issues (non-human damage), please contact us, we will definitely provide you with a satisfactory shopping experience!