Astro Dust color pigment is made of premium mica which offers the brightest colors in an ultra-fine powder. Our iridescent collection includes all 4 of our iridescent colors (Red, Green, Blue, Purple). The first color you see in each iridescent color is a shiny white or creme color, and then the underlying color shines as the light reflects off of it. Iridescent powders are great for mixing with other colors in order to create a subtle, multi-colored effect.