Mineral: Cobaltite on Chalcopyrite
Locality: Håkansboda mining group, Lindesberg, Örebro, Västmanland, Sweden
Dimensions: 5 x 6.5 x 3 cm / main crystal: 5.1 cm

Description: Mass: 191 g MIM number: 2249 Two crystals in the shape of a pentagonal dodecahedron, slightly shifted and parallel, well formed and considered large for the species. This specimen was found by serendipity in a wooden treasure chest under a house built in the 1630s. It was therefore probably mined before the element cobalt it contained was identified. Photographer: AINU / Augustin de Valence Ex collection: Peter Lyckberg (Sweden)

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