I see that.
Hope you like, what I tried to get out of your textures.
The flakes on the gold are a bit too much in my opinion but the updated version looks better than the 1st one.
May be I got trailed away with the flakes. I was trying out what to do - as I had no idea how to get a metal reflection just on this particular surface. I guess I will try one without flakes!
Still trying to learn what the different options in Iray-surfaces allow to do. It is far more complicated than 3delight.
The flakes would be cool to create stones similar to Labradorite/Andesit or opal- stones with shimmering planes inside. Less usefull for your texture but may be for an experimental idea to build a stone shader.