Cobaltite is not a common mineral. Perhaps the best examples of this mineral come from Sweden. Sharp, interesting crystals of various different crystal habits have come from Tunaberg, Nyköping, Södermanland; and well formed, pyritohedral crystals were found at Västmanland, at Håkansboda and in the Pelle mine, Riddarhyttan. In Norway, crystals of Cobaltite were found in the Skuterud Mines, Modum, Buskerud.
Cobaltite is very rare in the U.S. Small complex crystals, as well as massive
Cobaltite, came from the Kibblehouse Quarry, Perkiomenville, Montgomery Co., Pennsylvania; and Cobaltite with a coating of Erythrite
has been found at the U.S. Mine, Gold Hill, Tooele Co., Utah.
In Canada, cubic
crystals of Cobaltite come from the Brazil Lake occurrence, near Espanola, Sudbury District, Ontario; and large, massive
masses come from the ore
fields at Cobalt, Timiskaming District, Ontario.