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Stony-iron meteorites account for less than 1% of observed meteorite falls.  As expected, stony-iron meteorites are heavier than stony meteorites but not quite as heavy as iron meteorites.  They usually have rusted surfaces, and are always strongly attracted toward a magnet.

As their name implies, stony-iron meteorites consist of roughly equal proportions of metal and silicates.  The slice below consists of yellow-brown crystals called olivine (the gemstone name is peridot) scattered within a matrix of silvery-colored Fe-Ni metal.