Gold
Pure gold is the least likely precious metal to tarnish. But baby jewellery is not made in pure gold. This is because the metal is very soft and can dent and bend out of shape too easily.
It is the alloys in gold that make up the 9k, 10k, 14k and 18k baby bangles and children's earrings, that can tarnish. But the tarnish is easily removed with a polishing cloth. It's much easier to clean gold items than sterling silver.
Sterling Silver
The majority of our baby jewellery and children's jewellery is sterling silver. Besides being beautiful, especially when highly polished, it is the price that makes sterling silver the most popular precious metal. Currently 18k gold is 50 times more expensive per gram than sterling silver.
Sterling silver always tarnishes over time. But by storing her little baby earrings and baby bracelets in a plastic, zip lock bag, with the air pushed out, you can limit the air contact with the item, delaying and minimising tarnish. Sterling silver is made up of 92.5% pure silver and 7.5% copper. This is to make the silver harder, which makes it more suitable for use in children's jewellery.
If tarnishing isn't too advanced, it's easy to clean it off with a soft jeweller's cloth but if the tarnishing is severe, a jeweller can do the job for you.