On August 20, 1975, near here, W.W. Johnson of Amarillo, Texas, found a 16.37-carat rough diamond, the largest recorded since the Crater of Diamonds became an Arkansas State Park in 1972. Resting under a shade tree, he saw the sun glinting off something about 30 feet away and picked up a quarter-sized diamond that recent rainstorms had unearthed. He did not realize its significance until he learned it was larger than the 15.36-carat Star of Arkansas, discovered in 1956. For a time, he rented the rough diamond to museums for $300 to $500 a week, then later had it cut into a 7.54-carat marquise-shape gem valued at more than $150,000.