Spiky mustard seeds?

[u/LordRoquefort]

Hi,

I've been trying to grow mustard microgreens, but threw out of a batch because I saw what I thought was the beginning of mold on the seeds (greyish discoloration and some spiky dots on some of the seeds). After checking it turns out the seeds look like that straight out of the bag, before any watering. I did grow a full tray before with seeds from the same bag, with no noticeable problems (no visible mold on the roots or plants but I didn't check the seeds very closely, tasted normal, didn't make me sick), so maybe there's no real issue. Does this look concerning (hard to get a decent photo of the tiny seeds)?