Need iRay Rendered Diamonds in 3ds Max. Not Mental Ray.

I bought a file from [login to view URL] that has various diamonds in it with different shapes. It renders fine in mental ray and the diamonds are sparkle and they look like real diamonds. However, I need to render it using iRay and when I render it using iRay the diamonds look like white cardboard. I need someone to take the diamond file I have and adjust it so it renders using the iRay renderer. They need to look like real diamonds. The diamond models are already there. I am guessing the lighting, textures, etc. need to be adjusted so iRay can do it's thing. Can anyone help?