We recently heard about the world’s second largest diamond discovered in Botswana. A captivating gem at 1,111cts, this is the epitome of “a diamond in the rough”. It was discovered in the Karowe mine. Classified more as a bedrock that is openly exposed to the wild elements of Kalahari sand, it is pits such as this that are recognised as a place to watch for the next great gem. So, what makes a gem famous? From its carat value, to the colour of deepest blue, perhaps it’s everything at once these faceted beauties captivate us with.