(IDEX Online) - Sixteen Argyle Pinks are being offered for sale in what is described as a "once-in-a-lifetime opportunity" for collectors.Leibish is hosting a Festival of Argyle Tender Pink Diamonds at its offices in New York until 19 September.It describes the event as "the largest Tender stone collection in the world".A 1.28 carat, Fancy Deep Purplish Pink, 2PP, Oval shape Diamond with I1 clarity is listed at $1,472,100 and a 1.73 carat, Fancy Intense Pink, 3PR, Emerald shape Diamond with SI1 clarity is $1,470,600. Most other stones appear online without prices.The iconic Argyle mine, in Australia, closed in November 2020 after 37 years. It produced 90 per cent of the world's pink diamonds. Pic courtesy Leibish