Originally Posted by
Shamanic
What I do:
Uncommon gems (all but zephyrite/carnelian), make into jewellery and DE it.
Carnelian is usually transmute into inferno for most servers; but maybe spikes are still viable for you.
Zephyrite sell in stacks of 3 on quest day - otherwise, you're never going to shift them. Either vendor them or stockpile them if you have space and hope they sell for people levelling JC on new alts in MoP once mat prices go back up.
Rare gems, red, orange, purple, green (if it's worth it) cut and sell.
Yellow + blue I make 377 pvp necks/fingers.