It is common knowledge that certain echeverias can be propagated through leaves, the general opinion is that variegated leaves will produce normal plants. This is so ingrained I have even posted that myself. It is apt that this is first post returning to plants; Paul was a firm believer in testing everything as you never know what will happen. I am not against experiments, so I test every plant I get just to see if it will produce new plants, and if any turn out variegated.
The latest experiment was with leaves from echeveria 'Compton Carousel' and look what happens:
I am waiting to see if it throws out any more green leaves, otherwise as the old leaf dies it will die to. It is a lovely oddity though and while it stays almost pure white I think as suitable name is echeveria "Compton Carousel Ghost"