Sayona Mining Limited, together with its subsidiaries, engages in mineral identification, acquisition, exploration, and development in Australia and Canada. The company explores for lithium, graphite, and gold deposits. Its flagship property the North American Lithium project comprises 41 mineral claims covering an area of 1,493 hectares and one mining lease located in Quebec, Canada. The company was formerly known as DiamonEx Limited and changed its name to Sayona Mining Limited in May 2013. Sayona Mining Limited was incorporated in 2000 and is headquartered in Brisbane, Australia.