RAPAPORT... De Beers has released its sales schedule for next year, with the miner holding its usual 10 sights across the 12-month period.The miner sells most of its rough to sightholders through a contract system under which clients make certain purchasing commitments in return for consistent supply. In April 2021, the miner introduced a new sales agreement offering more bespoke supply for manufacturers, dealers and retailers. Alrosa, which operates a similar system, has not yet published a 2023 schedule on its website.The dates for De Beers' sights in 2023 are as follows:?EUR?Sight 1: January 16 to 20?EUR?Sight 2: February 20 to 24?EUR?Sight 3: March 27 to 31?EUR?Sight 4: May 2 to 5?EUR?Sight 5: June 5 to 9?EUR?Sight 6: July 10 to 14?EUR?Sight 7: August 14 to 18?EUR?Sight 8: September 18 to 22 ?EUR?Sight 9: October 23 to 27?EUR?Sight 10: December 4 to 8 Image: A collection of rough diamonds on display at the De Beers offices in Calgary, Canada. (Ben Perry/Armoury Films/De Beers)