Australia's iron lady on road to world-scale wealth - Forbes

Christie Walton is the widow of John Walton, one of the sons of Sam Walton, the founder of retail chain Wal-Mart Stores.

For now, Rinehart will have to be content with being the Asia-Pacific region's wealthiest woman, based on Forbes' tally.

Rinehart is the daughter of Lang Hancock, an Australian prospector credited with discovering giant deposits of iron ore in the 1950s that now make up Australia's largest export base.

China alone relies of Australian iron ore for nearly half its imports of the key steel making ingredient, and Japan, South Korea and Taiwan also are big buyers for their steel mills.

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Known as the "Pilbara Princess", Rinehart is also building stakes in some of Australia's largest media companies, drawing comparisons to another famously powerful Australian, Rupert Murdoch, head of News Corp and now a U.S. citizen.

Rinehart this week became the largest shareholder in Fairfax Media by more than tripling her stake in the newspaper, digital and radio broadcasting company. She already owns 10 percent of rival Ten Network Holdings.

Rinehart, who avoids media interviews, has been battling to keep details of a family legal battle out of the public eye.

Three of her children are trying to oust her as trustee of a multi-billion-dollar family trust, set up by her father before he died.