atop      found      only      recently      since      small      worth  
Crater of Diamonds State Park is an 888-acre park that sits an eroded volcano pipe in Arkansas. It is the public diamond mine in the world. For a price, visitors can come to the park and dig for diamonds and other gems. Visitors can keep anything they find. Over 24,000 diamonds have been found the park opened – some have been very valuable. In 1924, a 40 carat diamond millions of dollars was found in the park. Several other large diamonds have been more .