Both sterling silver and silver plated can be oxidised by the air to form a tarnish.
There are ways to minimise this and keep your jewellery in good condition.
Jewellery tarnishes more when its not being worn, so to ensure minimum exposure to the air and humidity, store the item in its own box, a zip-lock bag or a jewellery box.
Avoid contact with perfume, hairspray, soaps, creams and deodorants by putting your jewellery on after getting ready, not before.
Store each piece of jewellery separately to avoid tangles and scratches.

