Deep colored shader

The goal was to make a shader that looks like something colored is buried within the dark, glossy surface, and this is what I ended up with after a few tries.

Basically it's a phong material with diffusion set low and a very sharp highlight. The out color is made out of the following nodes:

• A surface sampler node. The facing ratio is connected to...


• A ramp shader. It goes from black to green. Of course any color could be used.
  


• A noise texture is also used.


• The noise textures out-color is multiplied with the ramp shaders out color. The result is connected to the color channel of the phong material

This was just a very short description of how the material above was made, but hopefully it can give some ideas and inspiration on how to make shaders with that deep, multilayered look.