Fancy deep grayish yellowish green 'Chameleon' diamond, pink diamond and diamond ring. Photo: Sotheby's.

Centring on a heart-shaped fancy deep grayish yellowish green diamond weighing 3.93 carats, surrounded by circular-cut pink diamonds and marquise-shaped diamonds extending to the shoulders, the pink diamonds and diamonds together weighing approximately 2.90 carats, mounted in platinum and 18 karat pink gold. Ring size: 6. Estimation 1,250,000 - 1,400,000 HKD (116,084 - 135,431 EUR)