A common mineral powder that has a lot of uses, such as improving skin feel, giving the product light-reflecting properties, and skin adhesion. When it is combined with other metal oxides it turns into the pearly effect by interference.

Attention: Mica is unfortunately linked to child labor and is mined and milled by children in India and Madagascar. I would tell you to not buy from brands who support these child labor practices, but brands who pull out of these deals also harm these communities. The best thing you can do is look for brands who source responsibly and are working hard to reduce child labor as much as possible.