Centring on an oval cabochon cat's-eye chrysoberyl weighing 20.14 carats, to a stylised mount pavé-set with brilliant-cut diamonds extending to the shoulders, mounted in 18 karat yellow gold, photographed unmounted.

Ring size: 6¼

Accompanied by Gübelin report numbered 11011011, dated 20 January 2011, stating that the 20.14 carat cat's-eye chrysoberyl is natural, of yellowish-green colour; also accompanied by an appendix stating the cat's-eye chrysoberyl "possesses an exceptional degree of transparency, combined with a well-centered, straight and very pronounced chatoyancy. Such a combination of properties is very rare in a chrysoberyl of this size."

Sotheby's. Jewels and Jadeite, Hong Kong, 06 Apr 2011