27.09 carats Ceylon Cat's-Eye Chrysoberyl and Diamond Ring. Photo Sotheby's

Centring on an oval double cabochon cat's-eye chrysoberyl weighing 27.09 carats, framed by brilliant-cut diamonds extending to the shoulders, mounted in 18 karat white and yellow gold. Estimate 320,000 — 400,000 HKD. Lot 1361 sold 400,000 HKD.

Ring size: 5 ¾

Accompanied by AGL report numbered CS41616, dated 8 January 2010, stating that the 27.09 carat cat's-eye chrysoberyl is natural, of Ceylon (Sri Lankan) origin, with no indications of clarity enhancement, and displays a prominent cat's eye of excellent quality.

Sotheby's. MAGNIFICENT JEWELS & JADEITE, Hong Kong,  07 Apr 2010