(n) magnetite
(n,vs) ore sorting
ore dressing
(n) crude ore
(n) mineral exploration
(n) coal mine
coal pit
(P)
(n) iron ore
(P)
(n) copper ore
(n,vs) abandoned mine
disused mine
(n) low-grade ore
(n) rich ore
(n) phosphoric ore
(n) iron pyrites
fool's gold
pyrite
(n) copper pyrites
fool's gold
chalcopyrite
(n) copper pyrites
fool's gold
chalcopyrite
(n) limonite
brown hematite
(n) stibnite (mineral)
antimonite
(n) vitreous copper
copper glance
chalcocite
(n) gold field
goldfield
(n) gold vein
gold-bearing reef
(n) mining and manufacturing industry
(n) mining industry
(n) mineral product
minerals
(n) mineralogy
(n) mineral matter
(n) mineral oil
(n) magnetite
loadstone
(n) hematite
(n) iron ore
(n) white lead
cerussite
(n) marcasite