lets see silver or gold chocolate..., it would have to be white chocolat that okay?, at bakers supplie stores they sell melting chips of chocolat and chocolate bark (think a pice o giant hersey bar...) to make it silver or gold you will need food coloring, i dont think i've seen gold before, but i have seen coper so you might need to look at the supple store for more colors, i think you should be abole to find somthing as they make little candies that you can put on cakes n stuff and they're all silvery,
when you have your food coloring in small amount of fondue to shade it right