Rio Tinto’s 2019 Argyle Pink Diamonds Tender collection of 64 rare pink and red diamonds from its iconic Argyle mine has delivered strong results reflecting intense global demand for the rare diamonds. “The 2019 Argyle Pink Diamonds Tender was highly sought after with a set of results that underscores the ongoing value appreciation of these gems in the history of rare coloured … [Read more...] about Rio Tinto’s Argyle Pink Diamonds Tender Delivers Exceptional Result