Micas without fillers or additives can be used as eyeshadows. Since colored micas are micas that have been coated with pigments and/or dyes, the more pigmented it is, the more adhesive it tends to be as pigments have good adhesion. You can tell how pigmented a mica is by its opacity. For example,
gold fine mica sticks to the skin better than
transparent gold mica.
HTH!
