I have some gollum jade cuttings in a mixed-species succulent potting (all in Al's gritty mix). Recently some of the leaves of the gollum have become covered in tiny black/brown freckles. Otherwise the gollum seems OK. None of the other plants in the pot seem to be affected by the same issue.

I've had regular jades with scale, but this doesn't quite look the same as what I remember.

Does anyone know what this might be?

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Thanks!
-Tara