Diamond Material Study

Decided to do a study on diamond materials. Was really fun playing with the dispersion and refract IOR values to get the desired look. I struggled a lot trying to get colored gems to look right though.

My next task is going to be doing a caustics study and then maybe go back and figure out colored gems such as emerald, sapphire and ruby. Please post your critique or any tips for colored gems or caustics, thank you!