SI6 Metals Limited, together with its subsidiaries, engages in the acquisition, exploration, and development of mineral resources in Australia and Botswana. It primarily explores for nickel, copper, cobalt, gold, silver, and platinum group and rare earth elements. The company holds 100% interest in the Monument Gold Project located in Western Australia. It also holds interests in Maibele Base Metal project located in Botswana. The company was formerly known as Six Sigma Metals Limited and changed its name to SI6 Metals Limited in December 2020. SI6 Metals Limited was incorporated in 2007 and is based in Nedlands, Australia.