To help you with the forge of essences you have two lists available. One with the formulas you have been listening to and you haven't identify yet; and other with the formulas you have already discovered and therefore, forged their respective relics.
Thanks to the first one, you will be able to quickly listen to any formula and find out its three essences on the essences list (named The Alexandria Portal in the game lore). Moreover, information about what object contained the formula and where you listened to it for the last time, is shown to you.
Thanks to the second list, you will be able to forge any relic whose formula you had already discovered without forcing you to remember it, you just solved that problem once, so we won't compel you to do it again ;).