Boy ##ce , 12 , finds one carat at Arkansas state park . Arkansas 's Crater of Diamond State Park is only diamond - finding site in the world open to the public . New gem is the first diamond found by a park visitor this year .
Boy Scout , 12 , finds 5.16 carat at Arkansas state park . Arkansas 's Crater of Diamond State Park is only diamond-producing site in the world open to the public . New gem is the 328th diamond found by a park visitor this year .