I have noticed this like formation on one of my Yellow Xenox, which is doing well otherwise (bought from a local dealer).
That is the only stalk I have seen it yet, almost appears to be in 2 places on that stalk, but mainly in 1 area.
I was thinking it is a disease by looking at a video with Dick Wright "Dick Wright on Echeverias 3: How to Grow" on Youtube, they mentioned mycoplasma.
Sure looks like what they show in a second picture at min 6:31
I cannot post links, othwerwise I would have posted the link with the video at that exact minute.
What do you think? Maybe some people have more experience with diseases on succulents.
At least so far I am convinced it is what they show in that video.
