I have a little box full of them and although they are interesting not much you can do with them. I pulled 2 out today to show a pic. After looking at them I am leaning more towards Cinnabar.
Those look like great barite specimens, and the Yellow Cat area has those, too. The pseudomorph nodules usually look different, however, with the top of the thin crystal blades generally knocked off. While barite is too soft to cab, the pseudomorphs have had the barite replaced and are pretty solid and can make good cab material. The more solid barite pseudomorphs from Yellow Cats and McDermitt areas often gets confused with sagenite agate once sliced. I wish I knew where I put my examples, but there are some photos of this material on the 'net (e.g., the
old auction here and this
collecting trip). They come in several color combos, and I don't think that the red comes from cinnabar (especially as it is too hard for cinnabar and doesn't streak red).