Earrings can contain genuine semi-precious stones, glass beads, natural materials, or genuine Austrian Crystal to accent.The ear-wires are made with surgical steel or surgical steel with a 18k gold overlay.(Ear-wires are nickel-free.) This is a significant benefit to our metal sensitive customers who can buy our earrings with confidence. Our metals consist of raw brass or copper elements. Each shape or disk is, cut and rolled out with our proprietary textures. We use scores of different textures and over 1000 shapes. All of our jewelry is Lead free and Cadmium free. The gold tone finish is a tarnish resistant 18k gold over brass, the silver tone finish is a tarnish resistant rhodium over brass, and the copper finish is a rose gold over brass. All of our jewelry is soldered together, never glued. This creates a slight variation in every piece, which gives the ambiance of wearable art.