u/HadesIsGreat

I got half a bag of clay from a member of my pottery studio who was quitting a few weeks ago and today when I opened the bag it had these weird black specks and lumps. The clay itself is supposed to have no speckles and it didn’t have them when I first got it. They are all over the clay so I can’t really just remove it either. Is it mould or something else I should be aware of? And should I just throw the whole bag?