Sentence Examples


  • The rocks are probably of quartz, i.e.
  • Gold is obtained chiefly from quartz reefs, but there are still some important alluvial deposits being worked.
  • The mines, which have been constructed for the purpose of working quartz lodes containing gold, are very extensive, and argue a high stage of civilization possessed by the ancient miners.
  • Jacquerod and Perrot have found that quartz-glass is freely permeable to helium below a red-heat (Comet.
  • The greatest development of quartz reefing is found in Victoria, some of the mines being of great depth.
 

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