No, you can only change some garbage purple gems in the officers in the main city (it's not cost-effective, expensive and rubbish)

If you want jewelry to process gems, you can rush the reputation of Mount Hyjal. It's much simpler now. Before graduation 1 week 1 time' 1 month ... those gems can only be sold before someone cuts them. ...

Or, you can take the logo on the hero copy and go to the 1 gem dealer near the NPC of Xindao Hotel to change the picture (this 1 week is faster and cheaper).