Australia's richest citizen, Gina Rinehart built her wealth on iron ore. The daughter of high profile iron-ore explorer Lang Hancock, Rinehart rebuilt her late father's financially distressed company, Hancock Prospecting, becoming executive chairwoman in 1992. Hancock's biggest asset is the Roy Hill mining project, which started shipments to Asia in 2015. She's paid off the $7.2 billion debt taken on for this project. The mining magnate is also Australia's second-largest cattle producer, with a portfolio of properties across the country.
