Here's a polish I picked up in CVS last week for about $2. Wet n Wild is a pretty awesome brand; they make nice polishes and they're very affordable. The Gold & The Beautiful is basically just dense gold glitter. I swatched it with three coats. It covers pretty well, but the nail line is still visible.
I think this polish is best for layering. You could layer it over a gold foil if you just wanted extra blingy gold nails. I layered one medium coat over four different colors to get a sense of the possibilities. (Index: Misa Heaven White; Middle: Wet n Wild Black Crème; Ring: Wet n Wild Teal of Fortune; Pinky: Zoya Mimi.)
This is definitely not a delicate gold shimmer, as you can see. I also think this polish would work very well for adding gold sparkle to a frankenpolish. If I can find an empty bottle, I may come up with something!