Siderite Epimorph after Calcite (Aggeneys, South Africa)
Broken Hill Mine, Aggeneys, Northern Cape, South Africa. 120mm x 70mm x 45mm.
This is a Siderite & Sphalerite Epimorph after Calcite that comes from Aggeneys. These came out when the shaft was being sunk, in discussions with the geologist in 2017 it was clarified that they are now too deep and no more of these specimens are available any longer.