Look out for signs of mold. If you see any eco-friendly mold, white fuzzy mold, or darkish black places (mildew) around the mushroom, usually do not consume it. Don’t get worried if the thing is blue staining—this is typical in Psilocybe mushrooms and an indicator that the mushrooms include psilocybin. https://magicchocolates.co.uk/product/caramel-copyright-chocolate-bar/