Use Alumidust powders in combination with Stone Coat Countertops epoxy or casting resins to achieve beautiful effects in your project. Use Alumidust sparingly as a small amount goes a long way. Alumidust is non toxic and can be brushed into the mold or added to your casting or countertop epoxy material. 
This Interference Color Alumidust powder will actually change color based on how the light reflects off of the object. They can be used by themselves or can be combined with other colors to create various undertones of color.