Lesedi La Rona, formerly known in media as Karowe AK6 or as Quad 1[1] by the personnel at the mine,[not verified in body] is the fifth-largest diamond ever found, and the third-largest of gem quality.

[13] On 18 January 2016, Chief Executive Officer William Lamb of Lucara Diamond announced a competition, open to all Botswana citizens, to name the stone.

[14] On 9 February 2016, Lucara Diamond announced that the stone had been named Lesedi La Rona which means "Our Light" in the Tswana language.

Botswana, South Africa and Namibia are the world's three top producers of mined diamonds.

Former diamond-mining geologist Phil Swinfen estimates, based on other similar sales, that the stone could be sold for $40–60 million.

[20] In May 2016, Sotheby's in London announced that the Lesedi La Rona diamond would be offered in a stand-alone auction on 29 June 2016.

Due to the size of the rough stone, Graff had to custom-build a new scanner with new imaging software to analyze it for the cutting.

The main stone, named the Graff Lesedi La Rona, is the world's largest emerald-cut diamond.

[7] In May 2015, the operation at the Karowe Diamond Mine replaced their Dense Media Separation (DMS) technology with six TOMRA XRT sorters for sorting material in the -60+8 mm size range.