The only reason I have any clue as to what this could be is because I have one that looks exactly like it and, in a stroke of sheer genius, I wrote the name on the bottom of the pot. I think it is some member of x Pachyveria, which are intergeneric hybrids of Pachyphytum and Echeveria. Because there are so many, determining the exact cultivar may prove difficult. Mine is "Blue Pearl" and it looked very similar until it's untimely demise.
You can check out this website to see some different varieties. Actually, some of the Pachyphytum look pretty close too.
Compare w/ x Pachyveria "Cheyenne" (source):
and x Pachyveria "Little Jewel" (source):