What kind of metals can be used in belly button piercings?

Good question.....Surgical stainless steel that is called 316 L, is what most places use if you don't ask for the better quality metals...BUT we don't like to use it in my shop, we carry 316 LVM, which is what they make surgical implants out of....316 L is what they make scalpels and forceps out of....those these are sometimes left in the body, tho they ain't sposed to.....GT-23-TI is the medical grade of titanium, the same metal they make pacemakers out of, and if you need a pacemaker, you can get it in one of 5 colors or Black or Gold, like anyone will see your pacemaker!!! But because of that technology we have Titanium jewelry, which most of the European nations are regulating for initial piercings....Do NOT use gold, niobium, or acrilics {unless it is a dental polmer based acrillic} as these are not good for initial piercings.....but once you are healed they work just fine......Hope this helps.................................