Use your jewelry for everyday use. Don't mind the scratches that will occur over years, they will be a part of the jewelry's history. Oxidized pieces on the jewelry will fade (over time) with every day or very frequent wear.
Taking well care of your pearls will give them an eternal shine. Your pearls are born from and consist of organic, living material. Any acid is therefore harmful to the surface whereby the pearl may lose its lustre and turn dull. Please avoid direct contact with Perfume, cosmetics, hair spray, cleaning products. Take them off when you shower or go swimming, especially in chlorinated waters. Wear your pearls often. Pearls benefit from the moisture from the body, so wear them often to keep them looking their best.