As you probably know if you checked the 2.1.0 Informations topic, the 2.1.0 patch will add more meta gems to the game.
Last week I only "found" two of them but I got lucky yesterday and found another two. (They're the two "unstable" on the left)

If you don't know what to do tonight, you should also check Unlimited Escapism vol. 2. It was released yesterday and it's got very nice scenes, you can also check the vol. 1 here if you missed it.