Silver tarnishes when it comes into contact with sulfur in the air. Sulfur is a common element in the environment, and it can be found in things like food, cosmetics, and even air pollution. When silver comes into contact with sulfur, it forms a chemical reaction that creates a layer of silver sulfide on the surface of the metal. This layer of silver sulfide is what gives tarnished silver its characteristic black or brown color.

There are a few things that can make silver tarnish more quickly. One is exposure to high humidity. The sulfur in the air is more likely to react with silver when the air is humid. Another is exposure to direct sunlight. The ultraviolet rays in sunlight can accelerate the tarnishing process.

If you want to prevent your silver from tarnishing, you can take a few steps. First, try to avoid exposing your silver to high humidity or direct sunlight. Second, you can store your silver in a cool, dry place. Third, you can use a tarnish-resistant cloth to wrap your silver when you're not using it. Finally, you can use a commercial silver polish to remove tarnish from your silver as soon as it appears.

Some situations can cause silver to tarnish

• Swimming Pools (they contain nasty chemicals)
• Jacuzzi’s and Saunas (chemicals and high humidity)
• Some bathing products
• Some beauty products
• Some deodarants/perfumes/creams etc
• Chemicals left on clothing after laundry
• High air pollution
• Eggs (anything creating sulfur)

This list is not exhaustive and I have heard some people say they don’t have chemicals in their house. We are not talking about industrial liquids here, just the chemicals in your household cleaning stuff, beauty products, bathing, and even air quality. 

These are ineret to regualr bathiing/washing and water. There is no need to worry about getting these items wet. Some chemicals might effect resin, but there are too variable to possibly make a list of what might or might not effect resin, so simply don't expose resin to anything nasty.

Glass is inert to virtually everything. In the case of both resin and glass, take precaution against harsh wear and tear. Both could be scratched, dented chipped, but that is the same for the metal itself. If you pick up a brick or grab an old spanner, you are likely to mark metal, resin or glass

Platinum will never tarnish, 18k golds can tarnish a very small amount, but hardly noticeable. 

9k golds can tarnish as they are typically made with a small amount of copper in the alloy. so you might encounter a small amount of tarnish on 9k golds, but this is typically easy to remove with a jewellery polishing cloth. 9k golds won't tarnish as badly as silver could.

In most cases tarnish can be removed with a jewellery polishing cloth

If it is stubborn or your piece requires some restoration you will need to return it to me.