Look out for signs of mold. If the thing is any inexperienced mold, white fuzzy mold, or dim black places (mildew) about the mushroom, do not consume it. Don’t get worried if you see blue staining—This is certainly frequent in Psilocybe mushrooms and an indicator which the mushrooms comprise psilocybin. https://magicchocolates.co.uk/product/alice-psilocybin-infused-dark-chocolate/