Rio Tinto just unveiled six super-rare "hero" diamonds from its 2019 Argyle Pink Diamonds Tender, an annual presentation of the finest production from the famous Australian mine. The 2019 tender could be the last for Rio Tinto, as the mining company will shutter its flagship Argyle mine in 2020 after 37 years of operation. Full story and more pics at our blog... http://futerbrosjewelers.thejewelerblog.com/
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