Watch out for indications of mould. If the thing is any green mould, white fuzzy mould, or dim black places (mildew) over the mushroom, do not eat it. Don’t be concerned if the thing is blue staining—That is typical in Psilocybe mushrooms and an indicator which the mushrooms include psilocybin.  https://psilocybin-chocolate-bars19483.ampedpages.com/top-polka-dot-psilocybin-chocolate-bars-secrets-60837569