Aye, when I was an engineer, I always kept a stack of rough stone in my bank, even though I was approaching the cap for engineering. Normally it is pretty useless really, but once in a while you will run into something that will require it, and you would wish you had some =).
Of course, if you decide not to keep the rough stone at all, then you are really out of luck. You could destroy thing with little value like blacksmithing hammer - this will give you one more slot and will cost under a silver to replace. In emergency, you could also destroy hearthstone, but that's really stretching it.
Of course, if you decide not to keep the rough stone at all, then you are really out of luck. You could destroy thing with little value like blacksmithing hammer - this will give you one more slot and will cost under a silver to replace. In emergency, you could also destroy hearthstone, but that's really stretching it.