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Arsenical cobalt or skutterudite, from Skutterude, near Modum, Norway

Arsenical cobalt or skutterudite, from Skutterude, near Modum, Norway

before 1889
Cobalt ore from New Caledonia

Cobalt ore from New Caledonia

before 1889
Cobalt ore, from New Caledonia, communicated by Mr. D. Dixon, analysed by R. Smith, 1876

Cobalt ore from New Caledonia

before 1889
Fragments of cobalt ore, from New Caledonia, communicated by Mr. D. Dixon, analysed by R. Smith, 1876

Cobalt ore from New Caledonia

before 1889