And for some succulent amazement, my Mystery mesemb (which had radical surgery some time ago) has bloomed. The blossom is a very pale lavender, about 1cm across. It's hard to spot, but it's there, in the center. I still have absolutely no idea what this plant is, but am sticking to my story that it is a Gibbaeum.
Have a wonderful weekend walkabout in your neck of the woods!