The diamond market is showing signs of recovery, according to August data from the Rapaport Trade Diamond Index. After a year of inventory markdowns, the index rose 0.5% for 1-carat diamonds in August, marking the first positive month since May 2025. This modest increase is significant as it breaks a year-long streak of flat or negative readings, signaling a potential shift in market forces.
The recovery was driven by smaller diamonds, with the 0.30-carat category jumping 2% and the 0.50-carat category advancing 2.5%. These stones are popular in bridal and everyday jewelry, and their strong performance suggests renewed demand in the mass and mid-market price points. The focus on smaller stones highlights a shift in consumer preferences, favoring more affordable and versatile pieces over larger, high-value items.
Smaller Diamonds Lead the Recovery
The Rapaport Index for 3-carat diamonds slipped 0.4% in August, indicating that larger stones continue to struggle. This disparity is significant for inventory planning ahead of the holiday season, as smaller, more liquid sizes are in higher demand than larger statement pieces. Retailers are likely to adjust their strategies, prioritizing inventory that aligns with current consumer trends and market liquidity.
The price gap between natural and lab-grown diamonds remains wide, with natural 1-carat stones averaging $4,200 to $4,600, compared to $700 to $800 for lab-grown equivalents. This structural difference reduces direct substitution between the two categories, giving natural diamond pricing more independence. A natural 1-carat buyer and a 750-dollar lab-grown buyer are increasingly different customers making different purchases, which further solidifies the distinct market segments.
Retail Demand Confirms Upturn
Signet Jewelers, the largest specialty jeweler in the United States, reported strong second-quarter results, with net profit exceeding $52 million, reversing a net loss of over $9 million a year earlier. Adjusted earnings per share came in at $2.19, surpassing analyst estimates of $1.72 as of September 9. The quarter also saw Signet revenue reach $1.5 billion in Q2 FY2027, with same-store sales rising 2.2% and adjusted EPS increasing 36% year over year. These results show the resilience of mid-market consumers and their willingness to invest in diamond jewelry.
Market Outlook and Key Indicators
While the 0.5% increase in the 1-carat index is modest, the direction and breadth of the recovery are notable. The performance of smaller diamonds, the stable lab-grown spread, and Signet’s strong earnings all point to a positive trend. For the broader market context, including gold and auction results, the weekly wrap provides additional insights. On the rough side, De Beers’ Sight 8 was scheduled for September 22 to 25, with results expected to influence midstream restocking confidence.
The 3-carat category remains an outlier, with prices down 0.4%. Whether larger diamonds will follow the smaller ones higher is a key question for the holiday quarter and beyond. The diamond trade will closely monitor these indicators as the market continues to evolve, with a particular focus on how larger stones perform in the coming months.
