Graff shapes world’s largest square emerald cut diamond

Multinational jeweller Graff has cut the largest square emerald cut diamond in the world, which ranks as the largest high-colour, highest clarity diamond ever graded by the Gemological Institute of America.

Dubbed the Graff Lesedi La Rona, the diamond weighs in at 302.37 ct, and is a top D-colour. It was cut and polished from the principal 1 109 ct Lesedi La Rona rough diamond, which was recovered at the Lucara Karowe mine, in Botswana.