Which mineral is a source of iron along with magnetite?

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Multiple Choice

Which mineral is a source of iron along with magnetite?

Explanation:
Iron comes from ore minerals that contain iron oxides. Magnetite is one such ore, and hematite is another common source of iron. Hematite has the formula Fe2O3 and typically carries a high iron content—around 70%—so it can be processed into iron with relatively straightforward metallurgy. The other minerals listed don’t provide iron: quartz is silicon dioxide, gypsum is calcium sulfate, and limestone is calcium carbonate. So hematite is the mineral that serves as the complementary iron source to magnetite.

Iron comes from ore minerals that contain iron oxides. Magnetite is one such ore, and hematite is another common source of iron. Hematite has the formula Fe2O3 and typically carries a high iron content—around 70%—so it can be processed into iron with relatively straightforward metallurgy. The other minerals listed don’t provide iron: quartz is silicon dioxide, gypsum is calcium sulfate, and limestone is calcium carbonate. So hematite is the mineral that serves as the complementary iron source to magnetite.

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