For metal: Almost all of our jewelry is made from the metal surgical stainless steel. It's hypoallergenic (allergy-friendly), waterproof, tarnish-proof, scratch-resistant, eco-friendly, and 100% recyclable! For plating: Our jewelry uses 18k PVD gold plating and 18k PVD rose gold plating. Although it is called plating, PVD plating is much stronger than typical plating. It is not only 10x thicker than standard plating but is also fully waterproof & tarnish-proof! For stones and pearls: You can check the materials used in the product you are looking at in the product description. All of our stones are AAA grade cubic zirconia and while some of our pearls are still imitation pearl we are slowly switching everything over to genuine freshwater pearls! Be sure to double check the product description to see which it is! For ear cuffs: All of our ear cuffs are made of 925 sterling silver. This is an intentional choice in order to keep the ear cuffs as comfortable as possible by using a softer metal that can be bent and adjusted as needed! Sterling silver does not have the same waterproof properties as stainless steel, but can be cleaned with silver cleaner.