For the past 20 years, Jesse Lofgren has slowly amassed a collection of Lake Superior agates.
But when he returned from a monthlong business trip earlier this week, Lofgren discovered that $60,000 worth of the gemstones were missing from his home.
Lofgren said a burglar smashed into two of his display cases, each about the size of a refrigerator, and stole 75 of his agates.
Lofgren, who described himself as a "very private person" said only a few people have seen the collection in his home.
The Monticello man has since shared his story on television and social media. He said he's also asked other agate collectors to keep an eye out for his collection.
"It makes it very difficult for the collection to get sold," he said.
Lofgren, who owns a window-cleaning business, said he doesn't have homeowners insurance.
"I probably could have recovered my losses," he said.