Aphthitalite
U. S. Potash Co. Mine, Carlsbad Potash Mining District, Eddy County, New Mexico, USA
7.0 x 5.5 x 5.1 cm. Two large, slightly offset, tabular crystals exhibit parallel growth with superb, glassy luster and gemminess. An added bonus for this colorless, uncommon potassium, sodium sulfate is the phantom in the center of the most forward crystal, which measures 6 cm across. From the 1000’ Level.
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