|In late 2016 Israel's Leibish & Co. announced it had won the first Internally Flawless Argyle Tender stone offered in more than 20 years. Leibish & Co. has been a major participant in the Argyle Tenders over the past 10 years and has bought a wide selection of stones. Last year, the firm bought 26 of the Tender diamonds.|
Over the past 30 years there have been no more than two 'IF' stones offered for sale. Natural pink diamonds over a carat are extremely rare; some would say beyond rare. To have one graded 'IF' is impossibly rare.