Look out for indications of mold. If the thing is any inexperienced mould, white fuzzy mildew, or dim black spots (mildew) around the mushroom, usually do not eat it. Don’t worry if the thing is blue staining—This is certainly popular in Psilocybe mushrooms and an indicator the mushrooms include psilocybin.  https://psilocybin-chocolate-bar34555.livebloggs.com/40239139/the-single-best-strategy-to-use-for-psilocybin-mushroom-chocolate-bars