Murfreesboro is a city in south central Arkansas.
Just south of the city is Crater of Diamonds State Park, on the site of a former diamond mine. The park, operated by the State of Arkansas, allows anyone (for a daily fee) to explore the park and keep any gemstones (diamonds or other) found, regardless of size. The most notable gem discovered is the Uncle Sam, which at 40.23 carats is the largest diamond discovered in the United States.