Sterling Silver Mystic Topaz Pendant (2.40 CT) With 18 Inch Chain 30 Day Easy Returns. Jewelry Gift Box Included .925 Sterling Silver Natural White Topaz stones are coated with a thin layer of film to give them a multicolored sheen. The process creates a wonderful rainbow colored effect on the stone. The process is not permanent, so extra care must be taken. 18 Inch .925 Sterling Silver Chain Included