Yes, there are blue/purple/black mushrooms. These are so blue they look black and they were right next to the satin-y ones. I have been to several web sites and looked at hundreds of pictures on Flickr, I even purchased an app about mushrooms for my phone and still I have not found the identity of these two. I have discovered if I want help in identifying I need a picture of the top, the underneath or the gills, and one sliced length wise, plus the smell is important as well. So, today has not been lost for the want of a mushroom identification.