SYDNEY (AFP) - Australia’s richest person Gina Rinehart has eclipsed Wal-Mart heiress Christy Walton to become the world’s wealthiest woman, according to an annual index by Business Review Weekly.

A preview of the respected BRW Rich 200 list, published Wednesday, put the mining tycoon’s personal fortune at Aus$29.17 billion (US$28.48 billion), a figure that sees her outstrip Walton for the first time.
In March, Forbes placed Walton and her family’s net worth at US$25.3 billion, while Rinehart’s fortune stood at US$18 billion.
BRW rich list editor Andrew Heathcote said mining magnate Rinehart had almost tripled her wealth in 12 months as commodity prices rose and she pulled off two deals in iron ore and coal.
“The Aus$18.87 billion increase in her wealth is unparalleled. It is a product of foreign investment in new projects, increased production and a recovery in the iron ore price over the past six months,” said Heathcote.
Rinehart, 58, heiress to an iron ore prospecting empire built in Australia’s resources-rich west, is a controversial figure who stridently campaigned against new mining taxes and recently bought up big in the media sector.
She is also locked in a series of lawsuits, including an acrimonious row with her own children over a family trust where she has been accused of threatening to financially ruin them.