Mount Gibson Iron Limited is an Australia-based mining company. The Company is engaged in mining and shipment of hematite iron ore at Koolan Island in the Kimberley region of Western Australia; mining of hematite iron ore deposits at the Extension Hill mine site and the haulage of the ore through road and rail for the sale from the Geraldton Port, and exploration and development of hematite iron ore deposits at Koolan Island and in the mid-west region of Western Australia. The Company operates through two segments: Extension Hill segment, which includes mining, crushing, transportation and sale of iron ore, and Koolan Island segment, which includes mining, crushing and sale of iron ore. The Extension Hill mine is located in the Mount Gibson Ranges, approximately 85 kilometers east of Perenjori and 260 kilometers east south east of Geraldton. The Koolan Island is located approximately 140 kilometers north of Derby, in the Kimberley region of Western Australia.