Michaelab:

The Ark of the Covenant was a wooden box covered with pure gold. One would expect the Ark to be gold in color and highly reflective. The shader in your above link is for the wooden poles, which were not covered in gold. hborre offers a complex gold shader on page 2 of this thread with procedural gamma correction. BagginsBill has offered a relatively simple gold shader at this link.

If you want the Ark to be mystical and you have Poser 8 (your Posersurface or root node looks like Poser 8), you could put a color and value on the ambient channels to make it give off its own soft light. One of the reasons that the Ark was covered with gold was to make it bright. The brightness represented the Shekinah (glory or bright light) of God. I have seen renders/pictures of the Ark with a flame or other light effect (as here and here) between the two angles to represent the presence of God.

Incidentaly, the wings of the angles were ment to shield people from accidentally seeing the Shekinah of God, which was too powerful for mortals to endure.

The Ark contained the Tablets of Stone (here) upon which the Ten Commandments were written, the rod of Aaron and a jar of manna.

lmk

Probably edited for spelling, grammer, punctuation, or typos.