I have had this succulent for years, and it had grown too tall, so I cut out the top and laid it in my kitchen window waiting to replant a few days.
The interesting thing that happened was that it developed a brown edge to the leaves (making me think of Kalanchoe tormentosa), and it gave me a clue to at least the fact that it was probably a Kalanchoe I finally found what looks like a match.
Kalanchoe viguerii. If anyone has a better I.D., I would appreciate it. I found this pic (and many other Kalanchoes I had not seen before at Cactus Shop. If you go here, BTW...how do you like the Kalanchoe 'Pink Butterflies' ???