alchemy: crocus of iron (crocus)

alchemy alchymia calcined caput chemical chemistry chrysopoeia colchicum colcothar crocus crystals curcuma elixir ferric formula green grimoire haematite haematites hematite herbs hermetic iatrochemie iron kabbalistic kidney knowledge kurkum laboratory lapis life lion maghemite magic martis martite medieval metals minerals mortuum mystery mystic occult ochre ore oxide philosophers philosophorum powder red rouge rust saffran saffron sign spagyric stone substance symbol vector vitriol vitrioli