Metal is 304 stainless steel as mentioned in the size The colored stones are Cuban zirconia The clear/white stones are also Cuban zirconia Push back studs Soft metal for the ear needle 304 stainless steel is made up of around 18% chromium and 8% nickel. 304L is a low carbon version. Could be worn daily if your a gender that likes bright jewelry. And Outstanding colors. Event friendly, wardrobe friendly.