Why is my silver jewellery starting to tarnish?
Sterling silver is an alloy containing both silver and base metals such as copper. The copper reacts with sulphur-containing gases in the air to leave a layer of copper sulphide which makes the silver start to look black.
Many other chemicals, and even humidity, sweat and oils can also react with the silver causing it to tarnish.
Tarnishing is a completely natural process and will happen over time. However this layer of copper sulphide can be cleaned off using a polishing cloth, and the easiest way to avoid it is to wear your jewellery regularly.
You can buy a polishing cloth here using the link below.