Mineral: Gaudefroyite with Calcite
Locality: N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
Dimensions: 2,5 x 1,5 x 4,5 cm

Description: Main crystal size : 4,4 cm Shiny black doubly terminated hexagonal prism with pointed terminations and remnants of matrix attached around the middle MIM number 1728 Photographer : Augustin de Valence (Ainu)

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