[Material]: S925 sterling silver plated with K gold on the surface (thick plating will keep the color longer) [Specifications]: Total length 21+2cm, chain width about 1.1MM, green zircon about 2.5MM [Color]: 14K gold [Maintenance] 】: Sterling silver is plated with K gold. Of course, it will oxidize over time. You can wash it with toothpaste or dishwashing liquid and put it in a sealed bag when not wearing it. [Packaging]: Independent transparent sealed bag, no packaging box.