The world's second biggest diamond could soon find a new home in a museum of a sheikh's collection – but only once it has been properly evaluated. The gem, uncovered by Canadian mining firm Lucara, is the largest diamond seen in the last 120 years since the discovery of the world–famous Cullinan Diamond. Pictures show the huge diamond resting in the palm of someone's hand, with its sheer scale further demonstrated by an image of it dwarfing a golf ball. Motswedi is not far behind the largest gem–quality diamond ever mined, the stunning 3,016.75–carat Cullinan Diamond. Its scale, as well as its striking blue–white colour and exceptional clarity, made it the most celebrated diamond in the world.