At the most recent jewellery auction at Christie’s in New York, a pink diamond ring was the star of the show, comfortably surpassing its pre-sale estimate. | Source: Pixelrz & Christie's

Rahul Kadakia, international head of jewellery at Christie’s

The Eden Rose ring, featuring a 10-carat fancy intense pink diamond surrounded by eight pear-shaped brilliant-cut diamonds and two additional marquise brilliant-cut stones.

This necklace features a cushion-modified brilliant-cut, 84-carat, fancy, intense yellow diamond.

Set in a ring, a heart-modified brilliant-cut, 2.28-carat, fancy vivid blue diamond surrounded by yellow and white diamonds.