This element was first discovered and extracted from the mineral as far as 1735. Its atomic number in the periodical system is 27 and its symbol is 'Co'. This metal is found in the Earth's crust and only in a combined form.

The origin of its name is rather interesting. The word was derived from the German 'kobold' which means a dwarf or goblin. Medieval miners believed that kobolds were very evil and tried to defend their underground treasure. Miners also gave this name to the ore of cobalt, because it contains arsenic that oxidizes during the process of smelting and becomes very toxic. Medieval miners were sure that they got intoxicated because of the kobolds' witchcraft.