Mica Powders are fine powders made of mica particles, pearly in appearance. These powders can be used to create metallic and iridescent effects on the surface of polymer clay. Mica powders are available under brand names PerlEx by Jacquard and Perfect Pearls by Ranger.
Metallic and pearl polymer clays contain mica powders in their formula. Mica shift effect can be achieved with these clays.
Please refer to my Faux Art Glass tutorial for a polymer clay project with mica powders.