Just fooling around with YafRay’s light dispersion settings. C&C welcome.
There’s probably enough eye candy in there to induce an optic plaque infection. 
It needs some transparency to look like a diamond, right now it looks like a discoball. The light reflecting looks good.
I wouldn’t use Putfile for hosting images, it’s slow and you don’t retain the rights to your image. You can try Photobucket or Imageshack.
its an upside disco ball! lol
I like the column thing its standing on - pretty cool
And Id have thought diamonds where a tad more transparent maybe ?
I still havent tried YafRay … lol - one of these days
cheers