KALIFANO 4" Gemstone Globe with Marine Blue Opalite Ocean with Antique Silver Nautical 3-Leg Stand Comes with an information card showing pictures of the gemstones used&#44; care instructions and a summary It is precision handcrafted taking hundreds of hours to complete. Grade A gemstones are used for the oceans and countries of the world. The stand and fittings are lacquered to prevent them from tarnishing. Limited maintenance &#45; Only requires occasional dusting or wiping off with a damp cloth to keep clean