If you have mica flakes, there is no need to buy mica powder (the finer mica glitter). All you have to do is put your mica flakes in the blender! Mica is non-toxic, so you don't have to worry about contaminating your blender. Doing this creates a lot of dust, so just make sure you have the cover on tight, and let it settle before taking the cover off. Also, you might want to wear a mask for extra safety, or perhaps do it outside; it could get messy! ;)