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it's gorgeous!
I never seen but I think it is a species of genus Pachyphytum.
Read here
http://crassulaceae.net/pachyp...
The construction of the flower seems to correspond. (Compare the formula flower for eg.here
http://www.flickr.com/photos/3... )
Try to find and compare.
https://www.google.com/search?...
Or google more. Can be and a hybrid or cultivar, in this case it is almost impossible to ID correct (Need to know more about the source of origin, hystori ...) . But seem to be close for some species
