A copper ingot

Copper Ingots can be obtained by smelting the relatively common Copper Ore or Copper Dust (made by putting copper ore in a macerator) in a furnace.

This metal is used for production of Copper Cable and Bronze, as well as several other machines. Like Tin, Copper cannot be used to make tools or armour unless made into bronze first. However, Bronze has 30% extra durability when compared to Iron tools and armour.