Hi guys, I need some answers about this grey stuff that appeared on this mushrooms. It is some kind of contamination? Are they still good to consume? I'm asking this cause this appeared after they dried, so when swim pick them up they look good , hi let them dry in a pyrex dish covered in paper towels and after they dried to the bone i found them like this. Never seen this before.

From what I can see is that you picked them a bit late and there's tons of spores all over the place. If you pick them a tad earlier before the veil tears you can avoid having the spores all over and from what I heard they are more potent that way. From the pics I can't see if there is anything else beside the black spores that could mean contamination. If it's just the spores they should be ok to eat.

There is this grey thing that u can wipe with ur fingers of them, like dust . It may be , cause a few days a go my friend clean his room and under the bed was very dusty. but hi is thankful for the advise.