I remember when I first started the xpac JC there was a chance with each cut to get an uber version of the gem you were cutting that was around 20% better stats. While I haven't been cutting masses of gems like I was while skilling up, I've still cut a good number thanks to gear upgrades on three level 80s plus the cuts I regularly do for guildies and I haven't had that power kick in forever.
Did Blizz remove it from the game, is it broken/nerfed or does it only apply when cutting green gems?