Cobalt is a common ore/ingot that can be used to craft basic-level armor and weapons stronger than stone but weaker than iron.
Ore[]
Cobalt ore can be found almost anywhere and regenerates faster than most ores, coal being the only ore to regnerate faster.
Uses[]
Cobalt is only used to craft weapons and armor, though the individual ingots fetch an okay price from the merchant and can be used for a moderate leveling up of the Merchant skill.