On Wednesday in New York, Rio Tinto unveiled its largest Fancy Red diamond yet to a select group of collectors, alongside other gemstones in its annual tender of pink diamonds. Known as the Argyle Everglow, the polished radiant cut diamond weighs 2.11 carats.
Mining company Rio Tinto has been showcasing stones from its Argyle mine in Western Australia for the past 33 years -- and during that time, less than 20 carats of Fancy Red certified diamonds have been sold.
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