Metallics are all about contrast -- bright highlights and dark shades. Galdor has the right idea, though to emphasize you might want to make the darks a little darker. You also don't want to shy away from putting them near each other -- metals don't react to light like other materials as they reflect it much like a mirror. So you have the underlying color of gold, but the surface itself is mostly covered with reflections so all those shades and highlights are from reflections of its surroundings.
Here is the trophy from Pixeljoint:
Also, your perspective is a bit off:
