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 and
grainy masses come from the
orefields at Cobalt, Timiskaming District, Ontario.