Answer:

ORE

AnswerCrossword Clue
ORECinnabar
OREContents of some pockets
OREForty-niner's quest
OREGalena, e.g.
OREGroundbreaklng discovery
OREHematite, e.g.
OREIt gets picked out
OREMetal source
OREMetalliferous rock
OREMine find
OREMineral quest
OREPiece of mine
ORESmeltery input
OREValleys
OREVein contents
OREVein glory?
OREWash. neighbor
OREBauxite, for one
OREBed contents
ORECopper container
OREForty-niner's paydirt
OREHopper's filler
OREIron or gold
OREMine output
OREPay dirt
ORERock group?
ORESourdough's find
ORETram load
OREAzurite or malechite
OREBauxite or galena
OREBauxite or pitchblende
OREBorax or galena
OREHopper load
OREIt's found in streaks
ORELode contents
OREMine material
ORENatural resource
ORENorthwestern st.
OREPiece of mine?
OREVein pursuit