Lucara Diamond Corp.'s 100 percent owned Karowe diamond mine, located in Botswana, has been in production since 2012 and is one of the world's foremost producers of large, high quality, Type IIA diamonds in excess of 10.8 carats, including the historic 1,758 carat Sewelô, the 1,109 carat Lesedi La Rona and the 813 carat Constellation which sold for a …