We at Kalici shop understand that every person is different and we each have unique skin-oils that may react differently to certain metals and materials. However, we are not responsible for your skin's reaction to our products. Our materials of choice is 925 gold and gold filled because it is high quality, but not as expensive as solid gold. Our pieces are OK in water, but gold filled jewelry will dull naturally over time. The less they are exposed to water and other harsh chemicals the better they will last. We recommend taking all precautions and taking good care of it by using a jewelry cleaning cloth to help in preserving its color and shine. Kalici shop makes a point to try to give you the best quality jewelry for the best price. We appreciate your understanding.