Calcite, Chalcopyrite

Unknown Owner

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A showy, complete-all-around calcite specimen from the Brushy Creek Mine. Lustrous, gray calcite scalenohedrons to 4.0 cm are aesthetically and preferentially coated with sparkly, lightly iridescent to non-iridescent, chalcopyrite crystals. This is classic combination material from this locale. 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. Karl Warning Collection and purchased at the Dallas Show in November, 1979 at the Texas State Fair grounds.