Copper Ore is mined and looks like this:
Copper ore block
It can be made into a ingot with 3 Copper Ore

A block drops 3 copper ore.

It can be randomly found in veins or singularly and usually spawns near the surface or in caves. and crafting into a ingot.

Copper ore

Copper ore

Where found Edit

Copper ore is found underground, imbedded in Stone. It is best harvested with a Pickaxe. It can also be obtained mining by hand, although this will take substantially longer