 | Rio Tinto is offering a 3.14-carat, vivid pink diamond at its 2018 tender, the largest vivid pink stone in the history of the Argyle mine. The emerald-cut 'Argyle Alpha' is one of 63 rare pink, red and violet diamonds at the 2018 Argyle Pink Diamonds Tender. The tender weighs a combined 51.48 carats. The stone is part of a collection of six “hero” diamonds. |
 | Over the next several months, the gems will be shown around the world to a select group of elite buyers. They will eventually be sold to the highest bidder. |  Argyle Muse |
