Gina Rinehart has lost $6 billion or a third of her wealth, thanks to plummeting iron ore prices. But with $12 billion, she is still the richest person in Australia. Once the world’s richest woman, the mining magnate seems to be recouping some losses. Rinehart dumped her 14.99% stake in Fairfax Media, publisher of Australia’s leading newspapers — The Sydney Morning Herald, The Age and The Australian Financial Review — for A$306 million last month.