Sterling is silver with a fineness of 925 parts per thousand or 92.5% silver and 75 parts per thousand or 7.5% copper. Copper is added to improve the metal's hardness, without changing the beautiful color of sterling silver.Our Sterling Silver Cufflinks are studded with crystals, cubic zircons, natural & imitation stones and are plated with rhodium. Traditional sterling silver Cufflinks scratches and tarnishes easily. The rhodium plating prevents tarnishing and surface scratches of our cufflink