What is the state gemstone of Arkansas?

The state gemstone of Arkansas is the Diamond. Arkansas is known for the Crater of Diamonds State Park, the only public site in the world where people can search for real diamonds. The park is located in the southwest part of the state and attracts visitors who wish to search for diamonds in the soil, where they were deposited by ancient volcanic activity. Arkansas has a long history of diamond mining, and the discovery of a large diamond in the early 20th century helped solidify the state’s association with the gemstone. The diamond was officially designated as the state gemstone in 1967.