These heart CZ stud earrings are made of 925 sterling silver and Gold Plated. The simplicity with which these heart studs were designed is genius. Its a sweetheart for an accessory and perfect for any friends. You will always be able to pair them with any outfit and break out of the norm from the studs you are used to seeing. The stones are a beautiful heart shape in a 3 prong setting that produces lots of sparkle.