All pieces are handmade in Sterling Silver. Silver undergoes a natural chemical process called oxidation which can darken the piece. That happens with more or less intensity depending on the proximity to the ocean, air pollution, the skin`s PH or how you store your jewelry. It is not related to the quality of the material. Keep away from perfume, cream, soap, talcum, heat, steam, chlorine, detergent, sweat or any chemical product. It causes damage to the silver and specially the gold plating. The natural stones and pearls are fragile materials that can break with impact. Clean your jewelry with a clean dry cloth and store in the original packaging away from other jewelry to avoid scratching.