I N THE SECOND quarter of 2025, wholesale trading prices for lab-grown diamonds continued to decline. According to Edahn ...

De Beers’ policy of offloading rough at slimmer margins enabled manufacturers to sell polished profitably at low prices. De Beers reported an underlying loss of $245 million for the first half of 2025 ...

According to data collected by Tenoris, the top-selling lab-grown diamond item in the second quarter was a 2.23-carat, round, ...

The 1-carat diamond price index gained 0.7% monthly but is 20% lower in annual terms, the agency reported. The 3-carat diamond price index dropped by 0.3% in April and by 0.9% year-to-date.

According to the diamond website, StoneAglo, 3.36 carat round diamonds usually range from $15,520 to $147,546 with an average price of $59,529.

The 0.5-carat diamond price index slipped by 0.7% in May, and rose by 1.8% since the beginning of the year. The 3-carat diamond price index was up by 0.6%, and down by 0.3%, respectively.