RAPAPORT... De Beers will allow sightholders to refuse more rough diamonds than usual at thisweek's sight, aiming to ease pressure on the market without reducing prices. Clients will be free to turn down 50% of available goods amid a slump in rough demand, a broker told RapaportNews on condition of anonymity. The company will also buy back up to 20% ofcustomers' purchases, compared with the standard 10%, he added. Unlike rejections, buybacks involve customers acquiring thediamonds, and then selling them back to De Beers at an agreed price. They are beneficial for sightholders, because the original purchase counts toward their "demonstrateddemand" - the track record of rough-buying that De Beers uses to determine futureallocations, the broker explained. The concessions are new for the August sight, which beginsMonday, and are part of De Beers' recent efforts to increase flexibility formanufacturers and traders struggling with an oversupply of rough and polished.Revenues from the sale are likely to be much lower than the $503 million theminer recorded during the equivalent cycle last year, the broker predicted. DeBeers will report the total next week. "[This] is a measure where they...try to maintain rough priceswhere they are, and where they should be...and help the midstream digest thepolished overhang," the broker noted. De Beers prefers to limit sales volumesrather than reduce prices, as discounts on rough can lead to retailers and jewelrymanufacturers requesting lower polished prices, he observed. In July, sales fell to their lowest level since late 2015,as sightholders rejected large quantities of rough. De Beers offered buyersextra deferrals of goods to later sights, and brought forward the annualopportunity for customers to reschedule their purchases. "We have offered customers additional flexibility duringsight sales to help manage short-term issues relating to higher-than-normalpolished-diamond inventories in the midstream," a De Beers spokesperson said. Image: Rough-diamond sorting at De Beers' Global Sightholder Sales operation in Botswana. (Ben Perry/Armoury Films/De Beers)