very common mineral iron hydroxide HFeO2 occurring in crystals but more commonly in yellow or brown earthy masses an ore of iron
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AnswerCrossword Clue
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