Lucapa Diamond’s 163-carat stone auctioned for $33.7 million

A diamond necklace featuring the largest ever D-flawless, emerald cut diamond has sold for US$33.7 million at an auction at Christie’s in Geneva, Switzerland.

The 163-carat precious stone was first discovered in 2016 by Australian miner Lucapa Diamond in Angola. The original 404-carat rough stone is the largest ever uncovered in the Southern African country.

“Early spectrographic testing at the Gemological Institute of America in New York declared the stone to be a D-colour, Type IIA diamond — a variety highly valued for its transparency and colour,” said Christie’s in a press release.

The stone was mounted in a diamond and emerald necklace by Swiss jeweler de Grisogono and was acquired by an unidentified buyer. “I never thought I would work with a 163.41-carat diamond of this quality,” said Fawaz Gruosi, founder of de Grisogono.

The sale coincided with the news of another discovery by Lucapa at its Lulo mine in Angola, this time a 129-carat diamond. Lucapa said the diamond was the eighth 100-carat plus find in 2017 alone.

Angola is the world’s fourth largest diamond producer by value and sixth largest by volume.