Rio Tinto Unveils ‘Impossibly Rare’ Diamond

Posted by Username on July 26, 2018 in Diamond

Melbourne, Australia–Last year, Rio Tinto made an astounding discovery at its Argyle mine in Western Australia and never said a word about it. The diamond mining company unearthed a 9.17-carat piece of rough that yielded a stone Rio Tinto Diamonds’ Patrick Coppens describes as “impossibly rare”–a 2.83-carat fancy deep grayish blue violet diamond that it


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