a hard earthy ore of iron
Crossword Clue

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AnswerCrossword Clue
ironstonea hard, earthy ore of iron
ironstonesIRONSTONE, a hard, earthy ore of iron
OCHEREarthy iron ore used as a pigment.
ocheran earthy usually red or yellow and often impure iron ore used as a pigment
taconiteslow-grade iron ore, containing about 27 percent iron and 51 percent silica, found as a hard rock formation in the Lake Superior region
taconitelow-grade iron ore, containing about 27 percent iron and 51 percent silica, found as a hard rock formation in the Lake Superior region
goethitevery common mineral, iron hydroxide, HFeO2, occurring in crystals, but more commonly in yellow or brown earthy masses: an ore of iron
hematitevery common mineral, iron oxide, Fe2O3, occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron