Copper is harvested using a pickaxe or shovel. There is a 3.0% chance to find this colored ore while mining. You'll need to level 75 in mining to start smelting this ore. Having a weapon crafted with copper ingots will give you 20% Energy dmg and 10% Poison dmg. And a total of 13% Resist.
Physical resist: 2
Fire resist: 2
Cold resist: 0
Poison resist: 7
Energy resist: 2