RAPAPORT… De Beers’ sales volume fell 4% last year due to weakened
demand for lower-value diamonds in the second half.
The miner sold 33.7 million carats of rough, compared with 35.1
million carats in 2017, as clients bought fewer of its cheaper stones, it
reported Thursday.
De Beers’ average price for sales — excluding some sales by its
joint-venture partners — rose 6% to $171 per carat for the year, reflecting the
larger proportion of higher-value goods. As a result, rough-sales value
increased 2% to $5.39 billion for 2018, according to Rapaport estimates based
on De Beers’ sight reports. The company’s average price index, which tracks its
rough prices on a like-for-like basis, declined 1% in the second half, but ended 2018 up 1% versus the previous
year.
Production grew 6% to 35.3 million carats, exceeding sales
volume.
Sales jumped 21% to 9.9 million carats in the fourth
quarter, with revenues also increasing, as the company allowed sightholders to
defer purchases from the September sight to later months. Production grew 12%
to 9.1 million carats for the quarter.
Image: De Beers’ Victor mine in Canada, which is scheduled to close this year. (De Beers)
2H Slump Dents De Beers Sales Volume
The Bottom Line
- De Beers sold 33.7 million carats of rough diamonds in 2018, down from 35.1 million carats in 2017, driven by reduced purchases of lower-value stones.
- The average price per carat rose 6% to $171, boosting rough sales value by 2% to an estimated $5.39 billion despite the volume decline.
- Production increased 6% to 35.3 million carats, surpassing sales volume, with a notable 21% sales jump in Q4 due to deferred purchases.
Summary by Rapaport AI
More Stories

Qatar Diamond Exchange to Collaborate with Italian Bourse
Parties signed MoU to extend connection among their members, broaden cooperation and advance commercial relationships.

China Signs Deal to Reinvigorate Interest in Natural Diamonds
Shanghai Diamond Exchange hosts signing of Beijing Declaration, with government representatives from Botswana, Namibia and South Africa.

AI, Gen Z Are Hot Topics at AGS Conclave
This year’s edition is last to take place in September, as event returns to spring in 2027.
