Natural crystal with imperfections (I'm using Yafray)

Support Materials and Textures
1

I’m working on a scene that involves lots of reflections and refractions, HDRI, dispersion, etc. You know, bling. :stuck_out_tongue: On a table, among other objects, will be a chunk of crystals. How do I make a natural crystal material with imperfections? Will I need to do extra modeling inside the crystals?

Thanks,
Steohawk