Rio Tinto reveals its final showcase of Argyle pink, red and blue diamonds 18 May 2021 share MELBOURNE, Australia--Rio Tinto has unveiled a preview of its final showcase of rare Argyle pink, red and blue diamonds from its iconic mine in the remote east Kimberley region of Western Australia. Mining ceased at Argyle on 3 November, 2020 and the 2021 Argyle Pink Diamonds Tender is the final collection of the rarest diamonds from the final year of Argyle operations. The Argyle Pink Diamonds Tender, an annual invitation-only event for the past 38 years, is widely considered...