Similar symptoms on a few jades received from the same place.

First I decided it was oedema and wasn't concerned, but now I've stared at it way too long and could use some help.

I can try more / different pix if these aren't good enough, I tried using smartphone through a 10X loupe, was not perfectly successful but maybe it's good enough.

There's nothing I can see on trunks/branches/stems, but I see plenty of examples of everything shown below on plenty of leaves.

The last two are the same leaf, after removing the big brown volcano thing, apologize for differing orientation, the crater from removal is at top leftish of last photo.

thanks, appreciate any thoughts! After staring I think the first picture may be scale and the second two oedema?

Daniel