A jade plant (I think Crassula ovata 'Gollum') on the left and an Echeveria on the right. There's lots written here on both - just do a search in the area atop the page. They both want as much light as possible.

I would guess it is sedeveria or pachyveria but not sure. Either way sure propagate it . Very easy. That way you have some back ups if one croak or some gI've aways for friends family

No matter what crassula it is, its definitely etiolated. The stem is different because of its etiolation. Now I'm not saying its a jade, as it very well could be platyphylla. IME a crassula platyphylla would have gotten a woody stem by that size and the leaves would be smaller. It doesn't make sense to me that the stem would thicken in etiolation as a platyphylla. It does make sense that it would become thinner as crassula ovata. I'll get a picture of my crassula platyphylla grown in partial sun tomorrow.

I agree with you Bitters. You can behead these and reroot the tops, though they will need more sun to prevent them from stretching out again.