SIDERITE EPIMORPH AFTER CALCITE

For pseudomorph collectors, we present this specimen of siderite perimorphic to calcite, now completely disappeared. The main crystal displays the shape of a truncated scalenohedron at the vertices. It is accompanied by two similar-looking crystals, but smaller and interpenetrating. A small, fractured crystal allows us to see the empty core of the siderite perimorphic crust. A very interesting curiosity from South Africa.

ORIGIN: AGGENEYS, NAMAKWA, NORTHERN CAPE, SOUTH AFRICA

DIMENSIONS: 7,8x6,1x7,9