Packaged minerals is a mod that adds new mineral resources to the generation of worlds, which although they are the same mineral resources, represent a greater amount of each mineral in a single block.

With this mod installed, while an iron block in Minecraft Vanilla will give us an iron block which, when burned, will give us an iron ingot, the compact mineral blocks will give us three iron ingots, and without having to be burned, because directly gives us the ore.