Look out for indications of mould. If the thing is any inexperienced mould, white fuzzy mold, or dim black places (mildew) on the mushroom, don't take in it. Don’t fret if the thing is blue staining—This is often frequent in Psilocybe mushrooms and an indicator that the mushrooms include psilocybin.  https://bookmarksfocus.com/story5139880/the-5-second-trick-for-mushroom-chocolate-bar-copyright-5-grams