
The 1,109-carat Lesedi La Rona first made headlines last June, when its seller, Canada's Lucara Diamond Corp, broke with tradition and offered the uncut stone at a Sotheby's auction (most rough diamond sales are completed privately), with an estimated price set at $70 million.

Graff chairman Laurence Graff with the 102.79-carat Constellation, the world's largest D-colour, internally flawless round diamond, which was cut from Graff's Light of Letšeng 478-carat rough.

The Graff Eternal Twins, two identical 50.23ct emerald-cut gems, were cut from a 269-carat rough diamond.

De Grisogono founder and creative director Fawaz Gruosi with the 404-carat "4 de Fevereiro" diamond, the the largest rough diamond discovered in Angola.

De Grisogono's emerald and diamond necklace took 1,700 hours to create and features the largest flawless D-colour diamond (163.41 carats) to ever to come to auction. It's expected to fetch around $30 million at Christie's Geneva on Nov. 14, 2017.

Last year De Grisogono acquired the 813-carat Constellation, billed as the world's most expensive rough diamond.

Chopard co-president and artistic director Caroline Scheufele says she still "gets goose bumps" seeing the suite of gems she created from a 342-carat rough that produced 23 diamonds.

"I wanted to explore every possibility and to represent all diamond cuts," said Scheufele of the 342-carat D flawless rough.

The highlight of Chopard's Garden of Kalahari necklace is a 50-carat brilliant-cut diamond.

Carla Bruni (left) and Eva Herzigova (right), seen here with with Chopard co-president Caroline Scheufele, were among the guests at the Garden of Kalahari launch during Haute Couture Fashion Week in January.

Rough diamonds are not only the preserve of the ultra-rich. In 2005 De Beers launched the Talisman collection featuring a mix of rough and polished diamonds. The collection included this medallion with 0.8-carats of stones (£3,650).


