The Luzenac Group is a talc mining company headquartered in Toulouse, France. The company is the world's largest producer of talc,^{[citation needed]} with mines and processing plants located in Europe, North America, Australia, and East Asia. The Luzenac Group was a wholly owned subsidiary of the Rio Tinto Group from 1988 ^[1] until August 2011, when it was sold to Imerys.^[2]