Umbrium armor is made from Umbrium Ingots. It only protects as much as Chain armor, but is more durable and more enchantable than Iron armor.

Book Wyrm Scale armor is made from Book Wyrm Scales. It protects slightly less than Gold armor and is less enchantable, but has higher durabilty.

Golden Book Wyrm Scale armor is made from Golden Book Wyrm Scales. It is as enchantable as Gold armor unlike its non golden counterpart, and offers armor thoughness. Like the material it's made from, each piece can be smelted into Gold Nuggets.