#Cu__copper__atomic_number_29  a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
  supertype:  metallic_element  conductor.material
  substance of:  bornite  chalcocite  chalcopyrite  cuprite  malachite  brass  bronze
  subtype:  blister_copper__blistercopper  an impure form of copper having a black blistered surface

No statement uses or specializes Cu; click here to add one.