Graff, a British jew­ellery firm, has cut and pol­ished the ma­jor­ity of the 20 largest di­a­monds dis­cov­ered in this cen­tury. This time on, Graff presents the Graff Lesedi La Rona, the largest square emer­ald-cut di­a­mond in the world, weigh­ing 302.37 carats, dis­play­ing the best D colour and high­est clar­ity. It is the largest high­est colour, high­est clar­ity di­a­mond ever graded by the Ge­mo­log­i­cal In­sti­tute of Amer­ica (GIA).

The Graff Lesedi La Rona was cut from a 1,109-carat rough di­a­mond dis­cov­ered at the Lu­cara Karowe mine in 2015 in Botswana. It was the largest gem qual­ity rough di­a­mond dis­cov­ered in over 100 years and the sec­ond largest ever found. From dis­cov­ery to com­ple­tion, the process of anal­y­sis, cutting and pol­ish­ing of the rough di­a­mond took Graff over 18 months re­quir­ing the ex­per­tise of the world's elite di­a­mond crafts­men. More­over, 66 ad­di­tional ‘satel­lite’ stones were pol­ished from the rough di­a­mond, rang­ing in size from un­der a carat to in ex­cess of 26 carats. Each di­a­mond has been laser-in­scribed with its unique GIA num­ber, Graff and Lesedi La Rona, and ac­com­pa­nied by a cer­tifi­cate from Graff and the GIA. Founder Lau­rence Graff says, “My love af­fair with di­a­monds is lifelong and craft­ing the Graff Lesedi La Rona has been an honour. This di­a­mond, our di­a­mond, is be­yond words.” The record-break­ing stone was given the name Lesedi La Rona, which means “Our Light” in Tswana, the of­fi­cial lan­guage of Botswana.

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