Tana Clymer, 14, of Oklahoma City visited Crater of Diamonds State Park in Arkansas with her family Saturday and discovered what was identified by the park's experts as a 3.8-carat canary diamond in the park's 37-acre area designated for visitors to search for and keep any gems they discover, The Oklahoma reported Monday.
"I kept asking my dad if I was dreaming," Clymer said. "I cried. I couldn't believe it."
The park does not appraise gems, but a similar diamond found in 2006 sold for $30,000.
Clymer said her parents are planning to have the diamond appraised and it will then be kept in a safe deposit box until they decide its fate.
"My dad keeps telling me not to get my hopes up, but it's too late for that," the teenager said.