How to identify Cobalt, Nickel and Balsam of Peru in ingredients?

Hi, I recently discovered I am allergic to cobalt and nickel, can someone please help me to identify these metals in skincare and makeup products? I have been suffering a lot, but it is rarely written Cobalt or Nickel anywhere and yet allergies appear, even on a simple MAC eyeliner pencil that only says it has irons. And are all the blue colors Cobalt? I am so lucky that I even have one + on Balsam of Peru besides ++++ both on Nickel and Cobalt, Thank you