|The Constellation, a 813-carat rough became the most valuable diamond of the year when it sold for $63.3 million in May. It was found at Lucara's Karowe mine in Botswana. It was bought by Nemesis International, which sold the rights to market the huge rough to Fawaz Gruosi of de GRISOGONO.|
The day before the discovery of The Constellation, an even bigger diamond was found at Karowe. The 1,109 carat Lesedi La Rona – the second largest uncut diamond in history. It later sold for $ 53m.
|Also in May, the Oppenheimer Blue, a 14.62-carat emerald cut Fancy Vivid blue diamond dubbed the “gem of gems’, sold for $57.7 million at Christie’s Geneva, setting a world auction record price for a blue diamond and becoming the most expensive gemstone ever sold at auction. $3.9m per carat.||The 5.03 carat Fancy Vivid Green 'Aurora Green' made $ 16.8m or $3.3m per carat.|
The 10.10-carat De Beers Millennium Jewel 4 sold for $32 million or $ 3.1m per carat in April of 2016.
A 7.32-carat pear-shaped fancy vivid blue diamond sold for more than $17.1 million at Sotheby’s Geneva in May. $ 2.3m per carat
|Pair of diamonds, weighing 52.55 and 50.47 carats, D colour, IF Type IIa. They sold for $17.6 million at Christie’s Geneva in November.|
17.07 carat fancy intense pink diamond VVS1 made $20.8m in November 2016.