Astro Dust color pigment is made of premium mica which offers the brightest colors in an ultra-fine powder. This jewelry grade color pigment is part of our iridescent collection of powders that gradually shine a different color when viewed from different angles. The first color you see in our Iridescent Blue is a silvery white or creme color. Then it starts to shine blue as light reflects from it. Iridescent powders are great for mixing with other colors in order to create a subtle, multi-colored effect.