The Iron Ingot is a Vanilla item, with many uses in Tekkit. It is obtained by smelting Iron Ore or Iron Dust in a Furnace. Iron Ingots are an overly abundant item in Vanilla with players often not having enough uses for it. In Tekkit, however, it is needed for use in many IC2 Machines, as well as using Iron Ingots in RailCraft, BuildCraft and much more. Iron Ingots can also be re-smelted in any Furnace (except the Alloy Furnace) to create the IC2 item Refined Iron.
Crafting will not consume the amulet.