Well, smooth things out!
Most of the inner lines of those things are very very jaggy! While if they would be made out of gold, they would be very very smooth!
Also get it more yellowish (search for golden items in the pixeljoint gallery as soon as it is online again).
Your colors are overall a bit of a mess I see now. I wanted to make an edit, but its too messy to make something good of it quickly..
Take down that color count. Remove the green and the red for now, you can add it lateron again if its really needed. Or make the gems very green too. But I cut out the creature and there were 28 colors!
How about 8 colors for the hair (max) and than 5 colors for the gold, where you can combine the bright and the dark colors of the hair again with the gold ramp?
Get your palette a bit more neat