Seems like the epic gems are going to drop from raid bosses

The most detailed interview that covers Gems is the tankspot one.

L: Will we be seeing epic gems in 4.3?

GS: Great question, and yes, you will! The way we're hoping to set it up, and we kind of have this working but things could change before we go live, is when you kill a boss on normal or heroic mode, each player gets a geode, and when they open the geode there's a chance they may find an epic gem inside. If not, it'll have blue gems or something like that. We really want it to feel like an individual reward, and not something that the raid leader gets to have fun in deciding who gets the gems, or they all go to the guild bank or something. We really want it to feel like an individual reward.

They'll be somewhat rare. It may take the entire content cycle before someone has replaced every red gem they have, but they won't be so rare that you won't see them.

L: How is that going to work with profession bonuses? Blacksmithing with its extra sockets, assuming that you could get ahold of a full set of epic gems, seems like it would all of a sudden become the best profession.

GS: I think the epic gems are like 10 stat points over the current ones, so it's a nice boost, but hopefully it won't push everyone towards Blacksmithing.

L: So you'd only end up with like 20 extra Strength as a Blacksmith.

GS: Yeah, something like that.


Source: TankSpot Interview

But the word "ONLY" which people are focusing on at the moment is from the Eurogamer interview

Eurogamer: Are there going to be new recipes?

Tom Chilton: There certainly are quite a few new profession recipes. We also introduce the epic gems in this patch, and they'll be available only through the normal and heroic difficulty of the Deathwing raids.

http://www.tankspot.com/showthread.p...A-Ghostcrawler

Bummer, I raid on my main so thats alright but was hoping for least xmuting them on my alchemists.