Look out for indications of mold. If the thing is any green mold, white fuzzy mold, or darkish black places (mildew) on the mushroom, don't eat it. Don’t fret if the thing is blue staining—That is typical in Psilocybe mushrooms and an indicator the mushrooms have psilocybin. . It's been close to since the 80s and is also a standard choice amon