Official State Gem - Encyclopedia of Arkansas
From 1972 to 2005, 25,369 diamonds weighing a total of 4,954.41 carats have been reported. The largest known stone discovered and reported during this period is a 16.37-carat white diamond unearthed in 1975 by a Texan, though earlier, in 1923, a diamond weighing 40.23 carats was unearthed. For additional information: Crater of Diamonds State Park.