For some reason, the scale turns to black when viewed from the left side side (left side of scale facing camera/light), instead of metallic-yellow.
The sequence should be, from left to right, yellow-green-blue-indigo, and then turn to black.

They look kind of... uh... plastic. O.o
I'll probably have to resort to painted glass style + refraction or something... They don't look metallic at all.

Well, this is as close as I can get with a mix of blinn and ramp...