Mineral: Ettringite with Calcite, Gaudefroyite and Hematite
Locality: N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
Dimensions: 11,0 x 7,5 x 7,5 cm

Description: Main crystal size: 4,8 cm Three lemon yellow crystals, one of them complete, on a matrix covered with calcite, gaudefroyite and hematite MIM number 791 Photographer: Augustin de Valence (Aïnu)

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