That's what mine does every once in a while and I find those chicks never revert back so I remove them. They get big and are indistinguishable from the common hen and chicks so I just toss them in amongst those. It makes me think that Oddity is a sport of the common green hen and chick.

I think your right tabby. I have some old tectorum type semps that look just like these. I just let them grow in some of my borders. That is probably what I'll do with them, stick them in a border somewhere.