The constellation diamond

The Swiss jewellery firm de Grisogono has just announced the acquisition of The Constellation, the world’s most expensive rough diamond. The purchase represents a ground-breaking moment for the company in its journey to become one of the world’s leading high jewellery and watch brands. This purchase is the firm’s second major acquisition in 2016, since in May it bought a 404-carat rough diamond; both gems from Nemesis International.



The Constellation- 813ct (PRNewsFoto/de Grisogono)


The Constellation weighs 813-carats, measures over six centimetres wide and was discovered by Canadian company, Lucara Diamond, at its Karowe mine in Botswana in November 2015. The gem was purchased for 63 million dollars (USD) earlier this year, following a competitive bidding process. The piece naturally boasts the colour, clarity and carat weighting of an internationally and historically significant stone. It is expected that the cutting process, due to be completed by the middle of 2017, may unveil one of the world’s largest certified flawless diamond.