Do you know the difference between Sterling Silver and Fine Silver?
Sterling Silver is 92.5% pure silver with some base metal, usually, copper added for strength. As the purity of the silver decreases, the issue of corrosion or tarnishing increases because other metals in the alloy may react over time with oxygen in the air.
Fine Silver is 97-99% pure silver, a little softer than sterling but very tarnish-resistant.
To help keep its shine, keep it in an airtight plastic bag when you are not wearing it. To clean it gently swipe it across with a polishing cloth.