“Langbeinite-553833,” Carlsbad Potash District, Eddy and Lea Counties, New Mexico, USA, by John Kygier. Public domain.
This material is nondescript and is cut solely as a curiosity. The gems are soft, pale colored, or colorless, with no fire. Few cut stones have been reported, but this may be due to a lack of interest rather than a lack of suitable rough.