But that all changed when she was asked to examine an oddly shaped large rock that a MI man, who didn't want to be named, had had in his possession for the last 30 years.
Usually, the rocks people bring her turn out not to be meteorites.
David tells FOX 17 he's going to wait a while and let the price value go up on his space rock nest egg. The farmer claimed the rock had fallen in the 1930s and that the new owner could have it since it was "part of the property".
A rock that's been acting as a doorstop for the past 30 years has an extraterrestrial origin.
For the past thirty years, he has used it as a doorstop and sent it off to school with his children for show-and-tell.
Mazurek says that when he sells the meteorite, he'll donate some of the money to the university.
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"I could tell right away that this was something special", said Sibescu, who determined the meteorite is made of 88.5 percent iron and 11.5 percent nickel. Millions of meteorites enter the Earth's atmosphere every year but the vast majority vaporise before they can make it to the ground, making intact specimens highly valuable. CMU geology professor Mona Sirbescu said that this is the first time in her time at the university that a rock she has been asked to test actually turned out to be a meteorite. "Meteor wrongs, not meteorites".
But this latest rock was the real thing - and valuable to boot.
That was all Mazurek needed to hear.
You probably don't have many incredibly valuable artifacts laying around your house, but if you did you nearly certainly wouldn't be using them as doorstops, right?
The meteorite is the sixth-largest found in MI. A mineral museum in ME is also looking into it. A colleague there further analyzed the sample, including with an acid test to reveal the Widmanstätten pattern, a property of most iron-nickel meteorites that can not be faked. It will be used as funding for students of earth and atmospheric sciences.