Sterling silver naturally tarnishes over time but it can be easily cleaned off to make your jewellery look good as new. For best results clean your jewellery as soon as it starts to show some tarnish (go a slight grey colour, dull or even look dirty). Why does it tarnish? Sterling silver .925 is an alloyed metal which means it has a small percentage of another metal (usually copper) mixed in with the silver to make it a harder metal. This small percentage of other metal reac