Jade roots very easily ... we just stick cutting in the dirt with the other jades, no special treatments, and they root themselves. Just don't overwater. You might want new media since you have rot going on, but otherwise, yeah, I'd just take your cuttings and root them ... the trunk is just a big cutting.

Not sure where the original is or what generation these could be called, but they are derived from a cutting that was taken in 1973.

Thank you!

You know to let the stump dry before repotting, right? And don't water until you think it has the beginnings of roots. You can tell when you touch it gently and it doesn't budge. Then you can water. Keep in a sunny window. I agree with Blueberry. Don't reuse that potting mix. Oh, and of course, a fast draining C/S mix.

Thank you!