Plumboferrite (type locality) with Hausmannite and Dolomite - image 1

Plumboferrite (type locality) with Hausmannite and Dolomite - image 2

Plumboferrite (type locality) with Hausmannite and Dolomite - image 3

Plumboferrite (type locality) with Hausmannite and Dolomite

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An excellent micaceous specimen from the type locality, consisting of elongate, platy, subhedral crystals of gray-black plumboferrite up to 1.5 mm inter-grown with brown-black, fine-grained, granular hausmannite and localized, cream-colored, discontinuous bands of dolomite. Plumboferrite is a lead iron manganese oxide. The Jakobsberg mine is situated in the Jajobsberg iron-manganese ore field in Sweden and is the type locality for several mineral species. Swedish Museum of Natural History label. Ex. Paulo Matioli collection.