Think You Have a Meteorite? People often run across rocks they think are meteorites. A true meteorite will be very dense and feel quite heavy. It’s usually magnetic and may have small inclusions called chondrules embedded in it. Most meteorites have what’s called a fusion crust, which is a black, ash-like, darkened exterior. The surface also has smoothed depressions and cavities that look like thumbprints. These are called regmaglypts. Finally, most are made of a mixture of iron and nickel. If you find something you think might be a rock from space, take it to a local observatory or a college
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