Mineral: Glaucodot on Chalcopyrite
Locality: Tunaberg, Nyköping, Södermanland, Sweden
Dimensions: 7 x 3 x 6 cm / main crystal: 4 cm

Description: Tunabergsgruvor, Södermanlands Län Mass: 183 g MIM number: 2250 Crystal in the shape of a parallelepiped with striated faces, very well formed for the species, laid horizontally on a matrix of chalcopyrite. This crystal is surmounted by another V-shaped twinned crystal. This specimen is considered large for this rare species. Photographer: Peter Lyckberg Ex collections: Carl Wilhelm Anderberg (1827-1871, Sweden), Peter Lyckberg (Sweden)

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