Hmm, I am now included to try to make this later (not tonight though, i'm tired).
As for advice, because the top is like a dome, I suggest having a a circular shadow gradient that covers it and becomes lighter in the center (to distinguish it is a dome. Also, I suggest having another gradient that goes --> this way to give it just a little more depth. As for the gold ring, I suggest making the out part of it dark to make it not look flat. I would also apply a little bit of noise to get it closer to looking the way the side view looks,