Sentence Examples


  • The principal ores of copper are the oxides cuprite and melaconite, the carbonates malachite and chessylite, the basic chloride atacamite, the silicate chrysocolla, the sulphides chalcocite, chalcopyrite, erubescite and tetrahedrite.
  • Erubescite, bornite, or horseflesh ore is much richer in copper than the ordinary pyrites, and contains 56 or 57% of copper.
 
 

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