ALT/FNDATA · Market Report
Q3 2025 Report: The Secondary Market for Fine Jewelry & Gems
Auction-realized prices and the luxury-equity backdrop
The year's quietest quarter: with no Geneva flagship and the marquee houses out for the summer, the value sat in the regional mid-market, where signed pieces from Cartier and Van Cleef still drew the deepest bids.
The headline
The correction in three numbers
$7.5M
Q3 2025 auction value
Across 5,582 sold lots; −24% like-for-like (−56% gross), the summer lull
$106,131
Top lot: a Cartier Tutti Frutti
At Piguet; the marquee houses sat out the summer
$2.4M
Diamond value
Diamonds led a regional, mid-market quarter
Auction-realized prices: what fine jewelry and gemstones actually sold for at the hammer, not asking prices. · 15M+ auction results · 850+ houses.
The read
What the data shows
ALT/FNDATA Q3 2025 report on the secondary market for fine jewelry & gems: the year's quietest quarter. $7.5M cleared across 5,582 lots (−24% like-for-like), the marquee houses out for the summer. A Cartier Tutti Frutti led at $106,131; diamonds anchored a regional, mid-market book. Free headline data; full report by email.
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The headline data above is free to cite. The full report is part of ALT/FNDATA Membership, which includes every quarterly market report and the Visual Analytics Hub. Inside this report:
- The full month-by-month auction breakdown (July to September)
- The luxury-equity backdrop: the majors dispersed in Q3 2025
- Where the value cleared in a thin summer calendar
- Methodology and how to cite the data
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Source: ALT/FNDATA, “Q3 2025 Report: The Secondary Market for Fine Jewelry & Gems” (June 2026). Based on auction-realized prices for fine jewelry and gemstones cleared at the auction houses ALT/FNDATA tracks, with public-market context from Q3 2025 luxury-equity performance. © 2026 ALT/FNDATA · altfndata.com/reports/jewelry-gems-market-report-q3-2025