Copper ore is a rather common mineral among miners. It is known for its shine while being rather weak.
Like the other ores, copper can be found in the overworld. It only requires a Crude Tool to be mined.
Copper Ore can be turned into Copper Ingots. These ingots can be used to create copper tools, armour and weapons.
Alternatively the ingots can be combined with tin ingots in order to create bronze tools, armour and weapons.