The man had this special rock in his possession for 30 long years and little did he know that the rock was more than just a doorstep.
The man brought the rock into Central Michigan University geologist Mona Sirbescu earlier this year.
"It's the most valuable specimen I have ever held in my life, monetarily and scientifically", Sibescu said.
A farmer who'd used a 23-pound rock as a doorstop since 1988 has learned that it's actually a meteorite worth $100,000 (£76,000).
For Sirbescu throughout her career, this has been a regular request, with no exciting outcomes.
"For 18 years, the answer has been categorically "no" - meteor wrongs, not meteorites", Sibescu said in a statement from CMU on Thursday. The estimated $US100,000 ($141,700) price tag puts the MI man's 10kg rock at $US10 ($14) per gram.
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In fact, the almost 23-pound hunk of iron and nickel is the sixth largest meteorite found in Michigan, according to the Smithsonian Museum and Central Michigan University.
He fell to the Ground somewhere in the 1930-ies, and came to its owner in 1988 when he bought a farm in Edmore.
"A meteorite", the farmer said matter-of-factly. In the morning they found the crater and dug it out. "It was still warm". When he asked about it, the farmer simply said that it was a meteorite that he and his father saw come down on their property in 1930s and that it "made a heck of a noise when it hit". As the new owner of the property, the man was told that the rock was a part of the property and that he could have it. Now it has been valued at over $100,000.
An additional sample was sent to John Wasson, professor emeritus in the Earth, Planetary and Space Sciences department at the University of California, Los Angeles, who will conduct a neutron activation analysis to determine the full chemical composition of the meteorite and potentially reveal rare elements that could increase its value.
As for the future of the find, Sirbescu said meteorites are often sold to collectors or museums.
Both the Smithsonian and a ME museum are considering purchasing the rock, according to Sirbescu.