分辨石头是黑色还是锈褐色。 确认石头的不规则形状。 看看石头上是否有熔壳。 检查表面熔化处的流线。 确认石头表面是否有凹陷和坑洼。 确认石头没有布满孔洞。

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If the rock you’ve found is a freshly fallen meteorite, it will be black and shiny as a result of having burned through the atmosphere. After a long time spent on Earth, however, the iron metal in the meteorite will turn to rust, leaving the meteorite a rusty brown.  This rusting starts out as small red and orange spots on the surface of the meteorite that slowly expand to cover more and more of the rock. You may still be able to see the black crust even if part of it has begun to rust.  The meteorite may be black in color but with slight variations (e.g., steely bluish black). However, if the rock you’ve found isn’t at all close to black or brown in color, then it is not a meteorite. Contrary to what you might expect, most meteorites are not round. Instead, they are typically quite irregular, with sides of varying size and shape. Although some meteorites may develop a conical shape, most will not appear aerodynamic once they land.  Although irregular in shape, most meteorites will have edges that are rounded rather than sharp.  If the rock you’ve found is relatively normal in shape, or is round like a ball, it may still be a meteorite. However, the vast majority of meteorites are irregular in shape. As rocks pass through the Earth’s atmosphere, their surfaces begin to melt and air pressure forces the molten material back, leaving a featureless, melt-like surface called a fusion crust. If your rock’s surface looks like it has melted and shifted, it may be a meteorite.  A fusion crust will most likely be smooth and featureless, though it may also include ripple marks and “droplets” where molten stone had moved and resolidified. If your rock does not have a fusion crust, it is most likely not a meteorite. The fusion crust may look like a black eggshell coating the rock.  Rocks in the desert will sometimes develop a shiny black exterior that looks similar to fusion crust. If you found your rock in a desert environment, consider whether its black surface might be desert varnish. Flow lines are small streaks on...