Baldur's Gate 3 is a huge RPG filled with all sorts of items to discover. While crafting is limited, there are a few materials that can be made into armor and potions. Act 3 brings your party of parasite-infested adventurers to the city of Baldur's Gate. The city itself is bigger than the areas in the previous two acts. Take your time when exploring the many alleys and streets so as not to miss anything. Enriched Infernal Iron is an item you may come across. This material can only be found in certain spots in the city. This guide will explain each Infernal Iron/Alloy and what to do with them.