Okay so I used to think that pewter turned your skin green, but I have a friend who wears pewter jewelry all the time and it doesn't do anything. I also found out that there is more then one kind of pewter, apparently there is a lead-free pewter. So is that the difference. I've just found out that there are a lot of metals used for jewelry (pewter, sterling silver, lead-free pewter, tibitan silver, etc.). What ones turn your skin green?