12-Year-Old Finds 5.16-Carat Diamond

Diamond found by Michael Dettlaff in Arkansas' Crater of Diamonds may be worth thousands of dollars.
1:49 | 08/12/13

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Transcript for 12-Year-Old Finds 5.16-Carat Diamond
We move on to the find of a lifetime for a 12-year-old boy. He was on vacation with his family in arkansas. When, oh, he discovered a true diamond in the rough. John muller has the story. Reporter: When michael's family stopped at this arkansas state park called the crater of diamonds, he wasn't expecting much. They tell you you'll find these little diamonds that are so small pip expected to get a couple of those. Reporter: Instead in a state best known for little rock, the 12-year-old found an enormous rock. We were there around ten minutes. I found it on top. It was glassy. Very smooth. Didn't look like anything else around it. Reporter: But he and his parents didn't realize he found real diamond in the rough. We all looked at it and dismissed it. Later on in the day, when we were ready to quit, we let in the kids go to the rock identification people by themselves. I brought the rock out of the bag. The guy who was there got bug-eyed. He said, hang on a second, i need to take this to the back room. People came from everywhere. It's a big diamond, they said. Reporter: Not just big. More than 5 karats. Appraisers say it could be worth as much as $15,000. If it can get cut and is valuable, I would probably have it dut and sell it. If not, it's a great souvenir. Reporter: It might not be the largest stone found there, a distinction that belongs to a 40-karat rock found years ago. It's not a bad souvenir. It was a rainy morning. We were thinking of november going. It's amazing how much attention a 5-karat diamond brings. Reporter: For abc news, john

This transcript has been automatically generated and may not be 100% accurate.

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