A very impressive, doubly terminated, large cabinet calcite specimen from the Brushy Creek Mine of Missouri. This lustrous, smoke-gray giant is composed of several crystals and has striking, multiple terminations at each end. The amazing saddle area in the middle is totally covered with sparkly, iridescent chalcopyrite. These specimens have very interesting development: the original scalenohedrons were all covered with chalcopyrite, and then the calcite began growing again, enveloping the original crystal in some areas and leaving the chalcopyrite exposed in others. Nearly pristine. Ex. George Feist Collection.