For some reason I couldn’t get this image to render in 3ds max after multiple attempts, so I had to recreate the model and set up the render again. (See ambient occlusion render here, and first fractal attempt here)
Because of the organic nature of the form, I wanted to do a render to match, so I went for a greenstone-like material. Once again, I used a noise map to try and achieve it, but I think the material needs a little more translucency in order to achieve the proper effect. In order to achieve that I might try use a subsurface scattering material in mental ray.