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2023-09-29 16:17 altermaven  
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Nepheline is a tectosilicate that belongs to the feldspathoid group. Having a good deal of aluminum, this mineral also has a very poor concentration of silica. This mineral is often found in igneous regions. nepheline that has been stripped of iron has use in manufacutring glass in lieu of feldspar.  
  
nepheline that is produced as a byproduct of apatite mining has found uses in ceramics, wood, textiles, leather, and oils. and as noted, due to its high aluminum content, it is often considered an aluminum ore.  
  
the mohs hardness of nepheline is about 6.