Fine mica (less than 15um) combined with spherical silica (250nm), silica beads act as ball bearings allowing mica platelets to slide across each other on the skin (leads to extremely soft & velvet feel).
Products to use it in
Make up products (e.g. foundations, face powders, mascara, eye shadows, eyeliners, lipsticks, blusher), skin care products (creams, lotions, cream liquid foundations, gels).