Please HELP,what metal are Chanel CC earrings?

  1. I want to get the Chanel post earrings with the crystals. I called my local boutique, but the SA did not know what kind of metal is used. I know they are considered costume jewelry, but I would like to know if they are gold or gold covered etc. Does anyone have them and know?
  2. It's just plain metal, not silver or silver plated but metal.