Always remove your jewelry when applying perfume, lotions and creams, before bathing in the sea or in the pool, salt and chlorine damage metals. 

Avoid wearing your jewelry during strenuous physical activity to prevent perspiration from dulling the metal.

Be sure to wash off any chemicals that come into contact with your jewelry immediately. Avoid using alcohol especially with colored jewelry since it can cause colors to faint away. 

Store your jewelry separately so they don't rub or scratch against each other.