A large proportion of my jewellery is made by setting a glazed paper image under glass, and so it is therefore not waterproof. Do take care, especially with the rings as it is very easy to forget you are wearing them when washing your hands. All the metal parts I use are lead and nickel free.
All jewellery should be worn with care. It is advisable to protect all jewellery from contact with water, e.g. while swimming, showering etc. Please take care not to allow your jewellery to come into contact with cleaning materials, perfumes or toiletries. Most metals and metal platings will oxidise and the colour may become dull with time. You can prevent some oxidisation by keeping the item in a sealed bag. Most silver plated items will eventually yellow with time, so give them a very gentle polish with a silver polishing cloth, and they should re-gain their old shine.