For folks interested in carunculation, that's an excellent example.

I'd suspect you'd be able to propagate it more easily if you took a lively leaf and try to propagate it from the stem tissue end. Usual conditions apply for making plants from leaves of Crassulaceae.

Heed the words of a master.... Jeff has very good advice. You will be significantly more successful growing a new plant from a leave that is fresh and has the stem end intact. I have done this several times with various Echeveria. Like any other cutting, you must allow the leaf to callous for a few days. Having said this, I find it to be much easier and more "fruitful" to behead a tall plant and allow the stump to grow new plants. They mature much faster into reasonably sized plants.

No, I've propagated from leaves before, but never from a leaf that was unlike the rest on a plant. I've tried a bifurcated Graptoveria 'Fred Ives' leaf and a convex Echeveria decora leaf, but both failed.