Ten of those beloved pieces are headed to auction next month. From an 11-carat fancy yellow diamond ring, estimated at £35,000-45,000 ($45,000+), to a citrine and diamond ‘Bird on a Rock’ brooch by Schlumberger for Tiffany, estimated at £8,000-12,000 ($10,000+), all evoke the magic (and mystery) of an author whose 34 novels have sold “90 millions copies in 40 languages to date,” according to Bonhams. I couldn’t help but be reminded of the 2014 sale in the same rooms featuring Agatha Christie’s jewels: her diamond buckle brooch sold for £27,500 ($35,292), and her diamond three-stone ring sold for £21,875 ($28,073).
This is also not the first time Bradford has put her baubles on the block. In 2013, Bonhams sold forty pieces of her jewelry for a total of £1.2 million.






![Origen of Alexandria (c. 185–253) Homilia in Genesim, Homiliae in Exodum, in Latin, translation by Rufinus, decorated manuscript on parchment [Austria, Lambach Abbey? c. 1150–1175]. Estimate: $150,000-$200,000.](/sites/default/files/styles/category_card/public/media-images/2026-06/origen.jpeg?itok=0V_4_Lt2)



