“I knew right away what it was,” he said. “I was so excited that I started shaking and called Josh over to take a look.” Tucker, 26, let out a whoop when he saw the stone. “It was oily and shiny and we both just knew it was a diamond,” Tucker said. “We freaked out a little bit — we couldn’t believe it.” The two quickly put the gem in a sandwich bag and took it to the park office, where it was confirmed that Liden had found a 2.2-carat, triangular yellow diamond.