Fashion jewellery tarnishes when exposed to moisture, oils, salts and acids. Our skin transfers all of these, See below for some tips to keep your fashion jewellery from tarnishing.
- Thoroughly wipe each piece of jewelry with a soft, clean cloth as soon as you remove it. The goal is to remove any oil, salt or acid contaminants and to dry the piece.
- Store your fashion jewellery in its case, or in your jewellery box, with a moisture-absorbing product like 3M's silver protector strips or the small silica packets that typically come packaged with suitcases and shoes. If you don't have access to moisture-absorbing materials, make sure each jewellery piece is thoroughly dry, then seal it into a ziplock plastic bag for storage.
- Dry your hands before handling, or putting on, any piece of fashion jewellery from your collection. Remove your jewellery before showering, swimming or exercising.
- Minor tarnish can be buffed off with a jewellery polishing cloth, but cleaning heavy tarnish may also remove some gold or silver plate from the piece, so go easy. Store clean and dry in a soft cloth containers to avoid scratching the items; store individual pieces separately.
Source : http://www.ehow.com/how_6181268_make-fashion-jewelry-not-tarnish.html