I have created three node groups to simulate gold metal. This file includes 14 presets for different situations: normal, glossy, rough, jewelry or ancient gold. The rar file include thumbs of these renders (500 passes).
The model has been made by Robin Marin (tuqueque). This time I have used the bleder test version. You can download it at "http://www.blender.org/development/release-logs/blender-261/blender-261-demo-files/".It was created to test materials and it is a CC-BY lincensed blend.
EDIT: Upgraded to 2.68 / Optimized