For those that love to sculpt (like me, he he), do the layering thingy as you usually would with your white, and follow what sam said,
BUT....
When you do your first bead (bottom bead), use gold glitters and when you do your second bead (top bead), use silver glitters, (or vice versa). So what you get is one colour on top and another colour on the underside. But allow your first bead to cure for a minute first so your glitters dont bleed into eachother.
xxx