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This is the biggest violet diamond Rio Tinto has ever found

Cecilia Jamasmie | May 03, 2016 | 2:46 am Top Companies Australia Europe 

[caption id="attachment_850908" align="aligncenter" width="900"] Image: Rio Tinto.[/caption] Rio Tinto (LON:RIO) unveiled Tuesday a rare 2.83-carat violet diamond, the largest of its kind ever found at Australia's remote Argyle mine, which could sell for more than $4 million. The extremely rare...

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