Polished Diamond Prices Rose Again in September, Led by Smaller Rounds
Rapaport's monthly RapNet report covers how polished diamond prices moved in September across carat sizes and quality tiers. Read the full report for the figures by category.
Read original on RapaportExecutive Summary
Rapaport's September price report tracks where polished diamond values are heading into the holiday buying season, with clear differences between stone sizes and quality tiers. Anyone quoting against the list or valuing inventory this quarter should read the source for the specific index moves by category.
Industry Impact
Monthly index movements feed directly into how the polished trade quotes and how banks and owners value inventory, so even a modest shift reprices goods that are already sitting on the shelf. For the midstream, the figure that matters is not the headline index but the gap between the categories a house actually holds and the rough it bought months earlier. A broad index can rise while the specific goods in a given safe stay flat. The real signal is segment divergence. Melee, commercial goods and better-quality rounds rarely move together, and reading one number as the whole market misleads buying decisions heading into the holiday season.
Next Steps
- Reprice your own held inventory by category against the latest list rather than applying one average across the whole safe.
- Set the index move against the rough cost of goods bought in earlier months to see where margin actually sits.
- Review melee, commercial and better-quality rounds separately, since they move on their own cycles.
- Confirm the period and the segment in the source before acting on any quoted figure.
- Time restocking to the holiday sell-through signals coming from your retail clients.