Mica is one of the most important mineral ingredients in cosmetics, used widely to add shimmer and sparkle. Basically if a product has a shimmer effect, it’s almost definitely mica. It is also popular in skincare products designed to create a glow effect, particularly those marketed as brightening or illuminating.
The biggest benefit of mica is its ability to create a natural shimmery finish, since it can be milled to a fine powder. Because it is naturally produced it is a particularly well-loved ingredient among organic and natural beauty brands, and is safe to use on almost all skin types with little to no side effects.