All jewelry is lead AND nickel free!
The pieces are made of iron and may include other minerals such as zinc, copper, steel, or aluminum. So far, I have not found anyone who has had an allergy to Paparazzi jewelry. Most people who are allergic to costume jewelry are allergic to the nickel.
Before Paparazzi, I could wear costume jewelry, but by the end of one day, my ears would hurt and be slightly red. With Paparazzi, I wear these earrings everyday with no redness or soreness.
If your skin turns green when wearing costume jewelry, that's a different problem. It's usually due to the acidity level of your body and not the jewelry itself. This can be caused by medications, diet, or health.