Minerals / Calcite, nailhead var. NSW, Australia.

Calcite, Calcium carbonate , CaCO3  Calcite is a very common mineral, found in nearly all geologic environments. This specimen is a druse of "nailhead" calcite crystals, on a rhodochrosite base. The crystals have a dusting of a black mineral, probably goethite. The rhodochrosite shows just a hint of pink colouration in places. It was collected from South mine, Broken hill, New South Wales, Australia. 

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