At the hammer

Sales/Results·Sotheby's New York·9 December 2025·Live auction N11815

High Jewelry

$29.7m in total, buyer’s premium included

Rare unmounted fancy intense blue diamond 3.48
Lot 156, Rare unmounted fancy intense blue diamond 3.48. © Sotheby’s 2025

120 of 128 lots sold

Prices are the prices paid, buyer’s premium included, as Sotheby’s publishes them; prices per carat and comparisons with the estimates use them too (Sotheby’s estimates do not include the premium). Prices in USD at the ECB rate of 9 December 2025. Photographs © Sotheby’s 2025.

Stones seen before

2 lots of this sale have been offered at auction before: the same stone, found by its laboratory report and weight. Resales

Source: Sotheby's lot pages and results, live sale N11815, read lot by lot by Precious Trade. Prices realised, buyer’s premium included.