Well as quite a few of you may know already PVP gems are now no longer BoP. What this means is they are now BY FAR the easiest gems to get in the game.
If you are farming honor, and don't want to spend honor on the gems. Open up another WoW and find a character account that isn't in use (yours or a friends). Sit this one in AV and let the honor just roll in while you do whatever else on your old char.
Or if you want lots of gems and want to make a good profit, open as many WoWs as possible and keep them all in AVs. It will be a boring day, but it will be worth it.