Source: I. Hennig & Co Ltd

Petra Diamonds sold the 32.32ct pink diamond to Diacore for $13.8m. The rare pink rough will be analysed and cut by the company's highly experienced team to bring out the beauty and best yield. Image: Diacore

The Enigma's unique cut was inspired by the Khamsa, a Middle Eastern symbol of a hand meant to offer protection that is associated with the number five, which is reflected in both the diamond’s 555.55 carats and its 55-facet cut. Source: michael-bowles.com

This 6.11-carat fancy-intense diamond ring sold for US$7,962,300. Source: Sotheby’s

These fancy vivid blue diamond earrings each weighing 3.06-carats and 2.61-carats each, sold for just under US$7.5 million. Source: Christie's