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To find out if a rock is a meteorite, look for the rock to be black or rusty brown, which shows that the meteorite has either just fallen or has been on Earth for some time. Next, determine whether your rock has an irregular shape with rounded edges as this is the typical shape of meteorites. If the outside of the rock has a featureless appearance or ripples, this could be a fusion crust and a sign that it passed through Earth's atmosphere. Finally, use a magnet to find out if the rock is magnetic. For tips on how to calculate the density of your rock or how to file its surface to find metal flakes, read on!