Rare 302.37 carat emerald cut diamond is up for sale sans a price tag
The Graff Lesedi La Rona diamond is colourless - which increases its value further. The Gemological Institute of America has reportedly described the precious stone as the 'largest, highest clarity, highest colour diamond ever graded' by the organisation.
The rare diamong piece found in Botswana is known as "Graff Lesedi La Rona". Image source: Graff Diamonds/Facebook