Sterling Silver will tarnish. This is not a defect but the result of a natural chemical process that occurs when Sterling Silver is exposed to materials containing sulphur and acids (such as those found in sweat and skin oils).
Anything, from medication, perfume or the ph balance of a person’s skin, can affect the extent of tarnishing to a piece of jewellery. Humid environments will also accelerate tarnishing. It is important to clean and care for your jewellery regularly to prevent any tarnish or discolouration from occurring.