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RAPAPORT… Rio Tinto’s rough-diamond production grew 4 percent to 18
million carats in 2016, the lower end of its guidance, as it continued to step up underground operations at its Argyle
mine in Australia.
Output at Argyle, known for its production of rare fancy pink diamonds and high volume of lower-quality rough,
increased 4 percent to 14 million carats. Production at
the Diavik mine in C…

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