gold and chrome material

I just wanna to know your opinion, and if anybody can help improve the materials great.

http://niksoft3d.coolfreepages.com/niksoft3d-subpages/vrayforum.htm

depending on how pure your gold is, the color will be different, as it stands now, your gold sphere looks like its made from 14k gold, but if say you wanted it to look more like 22k gold, then it would need to have a much darker, brassier looking color. i’ll post an example soon of what 22k gold looks like if you’d like

that will be great psy. thanks.