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. · 10M+ auction results · 100+ houses.
The read
What the data shows
The summer emptied the calendar. With no Geneva flagship and Christie's and Sotheby's largely out, the $7.5 million quarter sat in the regional mid-market, down about twenty-four percent like-for-like. Even so, signed pieces still drew the deepest bids: a Cartier Tutti Frutti ring led at $106,131, ahead of a Van Cleef and Arpels owl brooch. Diamonds anchored a thin book at some $2.4 million. The decline is the seasonal gap between flagships, not a read on demand.
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- 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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