Hi Folks,
Does anyone know why the gem dealer won't open for me? His door is locked. I have done the mission for the trolls, and have a ton of gems to sell (some were uhhh 'borrowed'), but dont appear to have any buyers.
Any ideas?

He is probably sleeping. come back later.

You can go to his house and he will say that his shop is opened in "working hours" (or something, cant remember right now). You have to wait some time. Just do some quests and come back there.

To clarify: simply waiting around won't help. The shop will be opened if you have advanced far enough in the quest line.