The etched piece is electroplated with 500 microinches (µin) of sterling silver, a slight oxidation and a protective finish. Most silver plate is just 10 to 20 µin thick, making this at least 25 times thicker!  This process is a nickel free process.   The result is a gorgeous matte super durable silver finish. Keep it a cool dry airtight box, bag or the packaging it comes with. You can use a silver polishing cloth or sterling silver cleaner but all you really need is a clean soft cloth.  Lead-free, nickel-free, and cadmium-free.