Mining magnate Gina Rinehart named world's richest woman

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An Australian mining magnate has been declared the richest woman in the world.

Gina Rinehart is now said to be worth 29 billion Australian dollars ($28bn; £18bn), having increased her wealth by nearly A$20bn in the past year.

Nevertheless, Ms Rinehart remains a controversial figure in Australia having been involved in some bitter public disputes.

Duncan Kennedy reports.

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