Rio Tinto unveils its largest Vivid Pink diamond
12 July 2018 Rio Tinto has unveiled the largest Vivid Pink diamond in the history of its Argyle Pink Diamonds Tender, during a world exclusive preview in Sydney. The 3.14 carat polished emerald cut diamond, known as The Argyle Alpha™, is part of the dazzling line-up of 63 rare pink, red and violet diamonds in the 2018 …