The 1-carat diamond price index fell 2.6% in November on a monthly basis, which is 8.2% lower than the same period the previous year and 7.7% lower than the level at the beginning of 2025. These data are cited in a report by the industry agency Rapaport (which calculates the international diamond price index).
Diamond prices continued to fall. The 1-carat diamond market weakened, with smaller diamonds seeing the steepest declines as trends seen in recent months continued, Rapaport noted.
De Beers held prices steady in its November sale while allowing buyers to cancel their offered shipments at any time.
The 0.3-carat diamond price index fell 6% in November, down 11.2% year-on-year and 12.1% since the beginning of 2025. The 0.5-carat diamond price index also fell 5.1% in November, down 21% since the beginning of the year. Meanwhile, the 3-carat diamond price index increased by 0.1% in November and has fallen by 0.6% since the beginning of the year.