The charred hunk of space debris is the sixth largest meteorite ever found in the state, and it's estimated worth tops $100,000.
The meteorite, which is around the size of a cantaloupe, weighs over 22 pounds (10 kilograms).
"I could tell right away that this was something special", Sibescu said.
Despite the rock's out-of-this-world origin, the farmer threw it in with his property, and Mazurek kept it for more than three decades. This isn't just any space rock, though.
A friend referred him to Mona Sirbescu, a geology faculty member at Central Michigan University's College of Science and Engineering.
David says the man who sold him the barn described the incredible tale of the meteorite making an impact crater in the backyard.
To test her suspicions, Sirbescu immediately began examining the properties of the iron, such as its magnetism, weight and composition.
David says his kids took the space rock to "show and tell" at school.
A USA professor has established a rock used as a doorstop is actually a meteorite worth thousands of dollars.
For double verification, a slice of it was sent to the Smithsonian Institution in Washington, DC, which validated it was in fact a meteorite, according to the press release.
The new owner came into possession of the meteorite after the farm was sold in 1988. The farmer told Mazurek that he and his father watched the chunk of rock slam into their property one night and picked it up the next day, when it was still warm to the touch. A mineral museum is also looking at buying the rock.
There is a possibility that the analysis could reveal rare elements that could increase its value.
"Just think, what I was holding is a piece of the early solar system that literally fell into our hands", Sirbescu said of the meteorite. "I'm done using it for a doorstop", he said, "let's get a buyer". Whatever amount he winds up donating, Sirbescu said her students, the university and herself have already been beneficiaries of the find.