Pearl Ex Powdered Pigments - Duo Violet-Brass - 14.17 GM are fine powdered mica pigments that are non-toxic, inert, and can be mixed into virtually any viscous, transparent medium and applied to any surface. It's safe, inert pigment that exhibits extreme colourfastness and stability. The different particle sizes produce different effects, from a smooth pearly lustre to a highly metallic sheen.