The country known for having the world's largest diamond mine is Russia. The Mirny Mine, located in Siberia, is one of the largest open-pit diamond mines globally and is renowned for its significant production of diamonds. Opened in the 1950s, the mine goes down approximately 1,722 feet and has a diameter of over 3,900 feet. While its active diamond extraction has decreased over the years, it remains a crucial site in the diamond industry. Russia continues to be a leading player in global diamond production, contributing to the market alongside other notable producing countries.