The Fortune Pink is an 18.18-carat pear-shaped fancy vivid pink diamond that is expected to sell for US$35 million at Christie’s in November. Image: Christie's

The Fortune Pink is an 18.18-carat pear-shaped fancy vivid pink diamond that is expected to sell for US$35 million at Christie’s in November. Image: Christie's

Rahul Kadakia, international head of jewellery at Christie’s

On 5 October, the 11.15-carat cushion cut fancy vivid pink diamond will be auctioned at Sotheby’s in Hong Kong with a presale estimate of $US21 million ($AU 30 million). Image: Sotheby's