Argentium Sterling Silver is a new type of sterling silver that is highly tarnish resistant. The benefits of argentium sterling silver are numerous. Argentium is manufactured with a lower level of copper alloy, and replaced with a germanium alloy. Copper is what causes tarnish to begin with - so decreasing the amount of copper in silver decreases the possibility of tarnish. Argentium silver is made to a higher standard than traditional sterling silver and is guaranteed to be not less than 92.5% pure. Argentium sterling also hardens to a greater degree than traditional sterling, providing an added benefit with your treasured jewelry creations. If and when your Argentium Sterling treasure DOES tarnish - it can be cleaned using normal methods for traditional sterling.