This is so cool.
An Oklahoma State Trooper, Marvin Culver, took his family to Crater of Diamonds State Park in Arkansas. This place is an old mine site, I think, and what they do is allow the public to do some prospecting. And old Marvin bagged himself a 4.2 carat diamond, the 17th largest ever found there. (The largest was 40 carats!) Worth $3000 for starters, depending on clarity etc. Nice way to spend the day, eh?