Sentence Examples


  • Iron-pyrites come almost entirely from Department.
  • Iron-pyrites was formerly called marcasite, a word variously written marcasin, marchasite, marchesite, marquesite, &c. The two names are now applied to distinct mineral species.
  • From copper-pyrites (chalcopyrite) iron-pyrites is distinguished by its superior hardness and by its paler colour.
  • It consists, indeed, mainly of iron-pyrites, with a notable but variable proportion of copper, sometimes with silver and gold, and not infrequently associated with lead and zinc sulphides.
  • Iron-pyrites - 297.2 170,312