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Argyle’s sparkle lights up Rio Tinto's newest collection of rough diamonds

Cecilia Jamasmie | October 04, 2012 | 12:40 pm Top Companies Australia Europe Diamond 

Miner giant Rio Tinto (LON:RIO) launched Thursday its “Specials” tender, which showcases the finest large rough diamonds from a year’s production from its three operating diamond mines. Precious gems greater than 10.8 carats qualify to be a “Special” and Rio...

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