Start with a basic ray traced material, with a fresnel falloff in the reflection slot, and higher specular and Glossiness values.

For the Diffuse slot, insert a "Gradient Ramp". This works almost exactly like a gradient ramp in Photoshop.

Set the Gradient Type to "Normal", which will change the color according to the angle at which it’s viewed. Also try "light" in this spot, that will change the color according to what angle the light hits the surface at. ...