Leibish Wins 16 Stones At 2020 Argyle Diamond Tender A Lasting Legacy: Argyle's famed pink diamonds live on after mines close News provided by Share this article Share this article NEW YORK, Dec. 30, 2020 /PRNewswire/ -- Leibish, an internationally recognized specialist and online dealer of natural fancy colored diamonds and colored diamond jewelry, takes home 16 stones at the 2020 Argyle Diamond Tender. 3 of the 16 stones won by Leibish at the 2020 Pink Argyle Diamond Tender Rio Tinto-owned Argyle mine's stellar annual event had every diamantaire craving an invitation, but few ever had the privilege. For the last three decades, Argyle has hosted a private invitation-only sale of their best-of-the-best annual pink diamond production. The vividly colored diamonds are in a league of their own because they are found in only one locale. The Argyle, in Western Australia, supplies over 90% of the world's fancy pink, red, violet and yes, even blue diamonds. Rio Tinto has skillfully balanced educating its investors and collectors about pink diamonds while ramping up its branding efforts annually. All this has made Argyle diamonds declared the world's most concentrated form of wealth.