Southstone Minerals Limited operates as a diversified junior mining company in Canada. The company holds three thermal coal, metallurgical and processing plant, and engineering contracts in the Ogies and Highveld coalfields, Mpumalanga province and Kliprivier coalfield, KwaZulu-Natal province in South Africa. It also holds interest in the Oena Diamond Mine, an alluvial diamond property, which is located in Northern Cape Province in South Africa. The company was formerly known as Tango Mining Limited and changed its name to Southstone Minerals Limited in October 2019. Southstone Minerals Limited was incorporated in 2007 and is based in Vancouver, Canada.