cool stuff but it looks more like cooper than gold.
brown -> yellow -> white is an easy way to do gold, then perhaps work in some hue variations (e.g. a touch of green) to make it look more natural.
are u able to extend the theme to border the world view and map areas?
i think this might add some coherence.
stone highlights seems a bit soft and blurry. are u able to vary the hues a bit more?