A retired California couple struck paydirt while visiting Crater of Diamonds State Park in Arkansas late last month when the soil yielded the visitors a large, pear-shaped yellow diamond. Noreen Wredberg and her husband Michael from Granite Bay spend much of their time traveling to national parks in the United States; and found themselves at Crater of Diamonds on Sept. 23, while they were visiting nearby Hot Springs National Park—the trip turned out to be more than worthwhile. They began searching the soil in a shaded area near the park entrance where it was chilly in the autumn air; so Michael suggested they venture into the open field where it was sunnier and warmer. Just 40 minutes into their jewel hunt, Noreen spotted the yellow diamond sparkling on top of the soil. She handed it to Michael who took it to park staff to identify, who confirmed it to be …