Mica is a natural stone mineral with shiny flakes. When micais ground into a powder, you get mica powder. Mica powders are therefore sparkly, sort of like very fine glitter. They're used to give a metallic or shimmery pearl-like effect.

Mica is a natural stone mineral with shiny flakes. When micais ground into a powder, you get mica powder. Mica powders are therefore sparkly, sort of like very fine glitter. They're used to give a metallic or shimmery pearl-like effect.