All of the attached findings are gold/silver plated brass, hypoallergenic and nickel free. Brass components can tarnish over time but it can be polish easily with a polishing cloth. The leather earrings's hoops are gold filled. All of the beaded pieces are made with Miyuki glass beads. I use seed glass bead on mostly on tubular necklaces. Please be gentle with them all the fringe beaded earrings. They should be hang or lay flat in order to keep them straight.