AuStar Gold Limited engages in the exploration of gold mines in Australia. It primarily holds 95% interest in the Morning Star gold project; and 97.5% in the Rose of Denmark mine located in Victoria. The company was formerly known as Mantle Mining Corporation Limited and changed its name to AuStar Gold Limited in December 2017.

AuStar Gold Limited was incorporated in 2003 and is based in Woods Point, Australia.