Watch out for indications of mold. If the thing is any eco-friendly mould, white fuzzy mold, or darkish black spots (mildew) to the mushroom, don't try to eat it. Don’t stress if you see blue staining—This is certainly popular in Psilocybe mushrooms and an indicator that the mushrooms contain psilocybin.  https://bookmarkindexing.com/story19084250/the-fact-about-psilocybin-chocolate-bars-that-no-one-is-suggesting