Another nice new addition to 2.4 just surfaced. And I'm sure all the jewelcrafters out there will be quite happy. Now, all those green gems that are likely sitting in the bank can be turned into a blue gem.
Combine three of each green gem, and voila! a random blue gem. Hopefully this will bring prices of blue gems down a bit as well for us non-jewelcrafters/non-miners.
Speaking of blue gems, I need to go pick up my Consortium "bribe" later today. I could always go for some extra rare gems.