On back-to-back days last week, Lucara Diamonds and Petra Diamonds unveiled gem-quality white diamonds weighing a combined 736.42 carats. On July 29, Lucara announced the recovery of a 393.5-carat Type IIa gem-quality white diamond from its Karowe Diamond Mine in Botswana. Just one day earlier, Petra unveiled a 342.92-carat Type IIa exceptional white diamond discovered […]