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Is it a meteorite?


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Hi, I'm new here. I found this suspicious rock that I think might be a meteorite. The discovery is magnetic and has a high weight due to its size (approximate density is 3286kg / m3). There is also a black crust and a flow lines on the surface.

Photo:

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Welcome to the forum Patrik,

Unfortunately, your rock is a common Earth rock or slag that contains iron. 

Take a look at your rock(s). If it glistens like a crystal structure (ie: quartz) at any point in the rock, it can’t be a meteorite. If it has layers, it can’t be a meteorite. It’s sedimentary. If it has small gas bubbles (vesticles) in it. It is not a meteorite, but basaltic or sedimentary. If it is moderately magnetic it is NOT a meteorite. If there is a thick crust on it, it can’t be a meteorite. If it has very rough surfaces or is angular, except for breakage, it is not a meteorite. If it is heavy, but not much heavier than other similar sized rocks, it isn't a meteorite. File off a corner or cut it. It won’t diminish its value. If there is all bright silvery metal it isn’t a meteorite. If it is all grey metal it can’t be a meteorite. If there is black crust as thin as a fingernail, and crazing on the outside of the rock, it might be a meteorite. If there are small silver specks visible in the filed off section, it might be a meteorite.

A simple test for your rock is to take the top off a toilet tank and make a hard streak with it on the unpolished porcelain underside.  If the streak is dark red or gray it is magnetite or hematite and is not a meteorite.

There are billions of magnetic rocks in the US, none of which are meteorites. Anyone can find magnetic earth stones nearly everywhere. Approximately 4% of all terrestrial rocks found in all of the 50 states are moderately magnetic. Just take a strong magnet and drop it into sand and you will see what I mean. Check our O Richard Norton’s, “Rocks from Space” or visit the ASU Meteorite Center.

Keep looking down. They’re out there.

billpeters

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