Lucara Diamond Corp. just recovered a 549-carat unbroken white diamond of "exceptional purity" from its Karowe Mine in Botswana — a mine that has earned worldwide recognition for producing the 1,758-carat Sewelô, the 1,109-carat Lesedi La Rona and the 813-carat Constellation diamond. Those diamonds rank #2, #3 and #8 on the list of the largest […]