A cycles crystal material test render
To achive the color dispersion effect 3 Glass Shaders with slightly different IOR values are used. Each of them has a different color. To make the material a little more bright I added a 4th Glass Shader using white as base color.
you can download the blend file here
The material is based on the diamond-Shader by ~theRealRichard
procedural parquet texture
checker multiplication texture
animated cycles material - part 3