Any treatment of an ore used to concentrate its valuable constituents (minerals) into products (concentrate) of smaller bulk, and simultaneously to collect the worthless material (gangue) into discardable waste (tailings).

(geology) any rock containing commercially interesting amounts of copper

(mining) Bornite.

A mountain range dividing Germany and the Czech Republic

plural of ore hearth

A low furnace in which rich lead ore is reduced.

limonite

(mineralogy) A variety of jamesonite, sometimes found in capillary forms and like a cobweb, but also massive.

alquifou

olivenite