The Pink Raj, which is claimed to be the world's largest pink diamond, is expected to fetch up to US$30 million when it is auctioned in Geneva next month. This week, the stone, weighing just over 37 carats, was displayed by auction house Sotheby's in London.
"It is a wonderful shape. It is a cushion modified diamond, with a lot of brilliance, a lot of facets, when you move it around and sort of have it on your finger," Daniela Mascetti , Sotheby's senior jewellery specialist told Reuters.
In 2015, the rough diamond was mined and now it is being auctioned by an anonymous owner. According to reports, several previous sales for smaller pink diamonds have yielded more than US$1 million per carat at auction.
In November 2010, a 24.78 carat intense pink diamond was sold for more than US$46 million in Geneva. It was a record price of per carat for pink diamonds.