Store your jewelry in a dry place. Moisture leads to tarnish. To slow down the natural tarnishing process, we suggest a small ziplock bag if your are going to give your jewels a break for more then a few days.
Avoid chemicals like household cleaners and liquid jewelry cleaner for All you need is a great polishing cloth. We love the Sunshine Cloth. You can also clean your stones with a soft toothbrush, water + a drop of dawn soap, then rinse completely, dry with a soft cloth.