The Largest Single Diamond Deposit Ever Discovered in the United States

The Largest Single Diamond Deposit Ever Discovered in the United States Under a plowed field in Arkansas lies the largest single diamond deposit ever found in the United States, and the state lets anyone dig it and keep what they find. In 1906, a farmer in Pike County, Arkansas picked up two glittering crystals. They were diamonds. The discovery set off a rush of more than 10,000 people, mining companies that failed again and again, two plants that burned on the same night, and the 40.23-carat "Uncle Sam," still the largest diamond ever found in America. So why couldn't anyone make it pay? And how did the country's biggest diamond deposit end up in public hands, dug with shovels and screens by visitors who keep every stone they find? In this video: How a 106-million-year-old volcanic eruption carried diamonds more than 3 billion years old up to the surface Why geologists spent most of a century calling the rock by the wrong name How Prairie Creek compares with America's other diamond district in Colorado and Wyoming The finds still coming out of the ground, including a 6.03-carat yellow diamond found live on TikTok in 2026 "Largest" here refers to the volume of diamond-bearing rock measured in a single pipe (about 78 million tons to 650 ft, per the Arkansas Geological Survey). #CraterOfDiamonds #Diamonds #Geology #Arkansas #Documentary