LOS ANGELES - Kevin Kinard visited Crater of Diamonds State Park in Arkansas regularly, despite having never found a diamond, but a recent trip turned into his lucky day.Kinard, a 33-year-old bank branch manager from Maumelle, Arkansas, found the second-largest diamond ever found in the park’s 48 year history — a 9.07-carat diamond.9.07-carat diamond found in state park Kinard and his friends brought equipment with them to wet sift and look for treasure on Labor Day. “I only wet sifted for about 10 minutes before I started walking up and down the plowed rows.