Hi,
With 3.2 coming soon there will be a new insanely easy way to make lots of money with jewelcrafting. Blizzard just released the news that uncut epic jems will be obtainable by prospecting titanium ore!
Original link to blizzard bbs blue post: World of Warcraft - English (NA) Forums -> Upcoming Epic Gems and Profession Changes
So stack up on these ores as much as you can! Most people don't know about these changes yet so you should still find them at resonable prices.
Buy them cheap now to make alot of profit once this gets implemented in 3.2.
----
Good luck and have fun!