(a) copper of a distinctive red colour, esp. pure copper as opposed to impure or alloyed forms; (b) (now rare) = red copper ore n.

A yellow mineral, probably copiapite or any of several other iron or copper sulphates or sulphides. Now historical.

(more fully grey copper ore) a grey sulphide ore of copper; (in later use) spec. = tetrahedrite, n.

(a) (with the) gold; cf. ore, n.2 3; (b) any of various yellow-coloured metal ores, spec. chalcopyrite (now chiefly historical).

a copper sulphide mineral of a grey colour; spec. = chalcocite n. at chalco-, comb._form affix; cf. grey copper n.

(a) (more fully copper pitch ore) a dark brown ore of copper containing chrysocolla and limonite; also called pitchy copper ore; (b) = pitchblende, n.…

= cuprite, n.

Grey copper or copper-ore, tetrahedrite.

an earthy variety of cuprite or copper ore, usually of a reddish colour.

Native red oxide of copper (a valuable ore).

= cyanotrichite n. at cyano-, comb._form affix 1.

cyanotrichite.

English regional (Cornwall). Mining. Yellow copper ore (typically, chalcopyrite) occurring in tin mines. Obsolete.

A monoclinic sulphide and antimonide of lead and copper, CuPb13Sb7S24, that is a rare ore mineral for the latter elements usually occurring as…

iridescent copper ore, esp. chalcopyrite or bornite; also called peacock ore.

= peacock copper n.

an ore of copper, bornite.

a variety of cuprite occurring as fine hair-like crystals; = chalcotrichite n. at chalco-, comb._form affix.