Discussion
Magnetite is distinguished among the iron oxides by being
Answer: A
Correct answer: strongly magnetic
Magnetite is the only common mineral strongly attracted to a magnet, and a specimen will deflect a compass needle. Haematite and limonite are the other common iron oxides and are at most weakly magnetic, so the test separates the three quickly - with the streak, red-brown for haematite and black for magnetite, as confirmation.
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