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Bonhams London Jewels Sale Features 10.37 Carat Colombian Emerald Ring and Historic Collections

market-auction · 2026-04-20

On December 11, 2025, Bonhams will host its London Jewels auction, featuring a stunning 10.37 carat Colombian emerald ring as its centerpiece. The event will include exquisite pieces from renowned brands such as Cartier, Bulgari, Boucheron, Mauboussin, Grima, Tiffany & Co., and Van Cleef & Arpels. Notable collections include a bracelet once owned by Nancy Astor and twenty items from Lady Glenconner's personal collection. Lady Glenconner, who was Maid of Honour during Queen Elizabeth II's coronation in 1953 and served as Lady-in-Waiting to Princess Margaret, adds historical significance to the auction. The sale will also highlight fancy coloured diamonds, emeralds, rubies, sapphires, and natural pearls, with designs ranging from antique to modernist Post War styles.

Key facts

  • Bonhams London Jewels sale occurs on December 11, 2025
  • Leading lot is a 10.37 carat Colombian emerald and diamond ring
  • Sale includes jewellery from Cartier, Bulgari, Boucheron, Mauboussin, Grima, Tiffany & Co., and Van Cleef & Arpels
  • Features pieces from Nancy Astor's collection
  • Includes 20 lots from Lady Glenconner's personal jewellery collection
  • Lady Glenconner was Maid of Honour at Queen Elizabeth II's 1953 coronation
  • Lady Glenconner served as Lady-in-Waiting to Princess Margaret
  • Sale presents fancy coloured diamonds, emeralds, rubies, sapphires, and natural pearls

Entities

Artists

  • Nancy Astor
  • Lady Glenconner
  • Queen Elizabeth II
  • Princess Margaret

Institutions

  • Bonhams
  • Cartier
  • Bulgari
  • Boucheron
  • Mauboussin
  • Grima
  • Tiffany & Co.
  • Van Cleef & Arpels

Locations

  • London
  • United Kingdom
  • Colombia

Sources