People try their luck everyday at Crater of Diamonds State Park, but many come up empty handed. That wasn't the case for 14-year-old Tana Clymer.
Tana and her family had spent a few hours digging for diamonds and had nearly given up when something the size of a jelly bean caught Tana's eye.
She said she wasn't too impressed with it at first, thinking it was nothing. Then, she thought it might be some kind of candy wrapper. When she poked at it further, she thought it could be a marble. When she placed it in her hand, that's when she realized it was something much more precious.
"So I clutch it as hard as I can and I yell, 'Mom!'" Tana described.
A park employee thinks the diamond may be worth somewhere between $15,000 and $60,000. Tana says she plans to use the money for college.
The family was so concerned about the diamond's safety that they placed it in a safe deposit box.
ABC News contributed to this report.