#nephrite  an amphibole mineral consisting of calcium magnesium silicate in monoclinic crystalline form; a source of jade that is less valuable than from jadeite; once believed to cure kidney disorders
  supertype:  #amphibole  a mineral or mineral variety belonging to the amphibole group
  member of:  #amphibole_group  a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum

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