We highly recommend investing in a pack of our revolutionary anti tarnish zip lock bags if you find your jewellery tarnishes easily! These bags use semi-conductor technology to transform plastics into a protective reactive barrier against corrosive gases, so by storing your jewellery inside, it stops it from reacting with the air which is what causes them to tarnish. This means Intercept literally reacts with and permanently neutralizes these gases that cause horrible tarnishing. The protection will begin immediately as soon as you place your clean jewellery into one of the bags and seal it up. This is a 5 pack of 2x3 inch bags and you can store gold and silver together. They last up to 10 years and have been specially designed to last as long as needed.