Where is the only active diamond mine in the USA located?
The United States only has two locations that have been operated as commercial diamond mines. One was the Kelsey Lake Diamond Mine near Fort Collins, Colorado. It produced small amounts of diamonds between 1996 and 2002 when the mine was closed due to legal problems.
The second is at Crater of Diamonds State Park near Murfreesboro, Arkansas. It was worked as a commercial diamond mine in the early 1900s but closed because the deposit was subeconomic. It has since been operated by the State of Arkansas as a tourist "pay-to-dig mine" where anyone can pay a fee, look for diamonds and keep any that they find. A few hundred carats of diamonds are found there each year.
Diamonds, diamond indicator mineral assemblages and potentially diamondiferous rocks have been found at hundreds of locations within the United States. One or more of these locations could become commercial and make the United States a significant producer of gem-quality diamonds.
Although millions of carats of diamonds are consumed each year in the United States, only a few hundred carats are domestically produced. The only active diamond mine in the country is the Crater of Diamonds Mine near Murfreesboro, Pike County, Arkansas. There, recreational prospectors have been finding a few hundred carats of diamonds per year since the early 1970s. Most of the stones are white, yellow and brown in color but a wide range of diamond colors has been found at the mine.