Look out for signs of mildew. If you see any green mould, white fuzzy mildew, or dim black spots (mildew) to the mushroom, do not try to eat it. Don’t fret if the thing is blue staining—That is frequent in Psilocybe mushrooms and an indicator that the mushrooms contain psilocybin.  https://45listing.com/story21563639/an-unbiased-view-of-copyright-herbs-for-sale