Covellite replacing chalcopyrite, specimen enlarged 3.5 diameters from O.K. mine. Utah. 1908. Plate 21-A, in U.S. Geological Survey. Professional paper 80. 1913.
Summary
Covellite replacing chalcopyrite, specimen enlarged 3.5 diameters from O.K. mine. Utah. 1908. Plate 21-A, in U.S. Geological Survey. Professional paper 80. 1913.
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