If stud, posts are made from surgical stainless steel. If hoop style, they are made from gold plated stainless steel. If hook style, made from surgical stainless steel or gold plated surgical stainless steel. Each item is handmade with care from polymer clay. Each item may differ slightly. There may be slight imperfections. Stud will be backed with butterfly and silicone backings. Hook will be backed with silicone backings.