red copper

English

Noun

red copper (uncountable)

1. (mineralogy) red copper oxide; cuprite
2. pure copper, as opposed to an alloy (cf. yellow copper)
   • 2004, Jean Guilaine, Jean Zammit, The Origins of War: Violence in Prehistory, John Wiley & Sons, →ISBN, page 173:

     Their popularity began to fade as soon as red copper daggers appeared on the scene.

   • 1895, Bering Sea Tribunal of Arbitration, Fur Seal Arbitration: Proceedings of the Tribunal of Arbitration, Convened at Paris Under the Treaty Between the United States of America and Great Britain, Concluded at Washington February 29, 1892 for the Determination of Questions Between the Two Governments Concerning the Jurisdictional Rights of the United States in the Waters of Bering Sea, page 320:

     He reports further that the natives had daggers of iron and sometimes of red copper; that the latter metal was common enough with them; ...

   • 1990, Mineral Deposits of China, →ISBN:

     Not only the red copper had been hammered, but also red copper articles such as small axes made by molding were found.