SURGICAL STAINLESS STEEL: is much more durable than silver or platinum. This durability is due to a Chromium coating that is chemically bonded to the steel. The invisible coating protects the steel underneath from oxidation (tarnishing and rusting). It also protects against scratching by taking the initial impact of a scratch and then resealing itself. It will not rust, corrode, tarnish, stain, fade, or turn your skin green, and is hypoallergenic. I sell only quality 316L surgical grade stainless steel.