A friend referred him to Mona Sirbescu, a geology faculty member at Central Michigan University's College of Science and Engineering.
"The answer has been categorically "no" - meteor wrongs, not meteorites", she said jokingly.
"Within seconds, I knew it was a real one", Sirbescu said when she saw the meteorite.
The professor sent a slice of the rock to a colleague at the Smithsonian Institution in Washington, D.C., who reportedly confirmed her discovery.
"It's the most valuable specimen I have ever held in my life, monetarily and scientifically", Sibescu added, noting that the meteorite is composed of of 88.5 percent iron and 11.5 percent nickel.
The man, who wanted to remain anonymous, said he was aware of the rock's provenance from the time he bought the house in Edmore in 1988.
The owner thought little of it and kept it as a door stop, until recently when he chose to find out how much his unusual rock was worth.
The rock, which came down on farmland in Edmore, Michigan, in the 1930s, could be worth $100,000 (£77,000).
A rock (pictured) that was used as a door stop for three decades has turned out to be a meteorite worth $100,000 (£76,000).
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A USA farmer and his son saw a shooting star come crashing onto their property one night in the 1930s.
He asked the then homeowner about it and was told it was a meteorite found on the property in the 1930s.
When the new owner moved after a few years, he took the rock with him and continued to use it as a doorstop.
What makes the meteorite found in MI unique is that it is 88% iron and 12% nickel.
More tests are being conducted to see if the meteorite contains rare elements.
The Smithsonian museum has valued the meteorite, which they named the Edford, at $100,000.
"Just think, what I was holding is a piece of the early solar system that literally fell into our hands", she said.
The Smithsonian and a mineral museum in ME are considering purchasing the specimen.
The meteorite's owner said he will donate 10 per cent of the sale amount to the university.