Instead of a lump of coal, how would you like to find a 30.86-carat diamond in your stocking? The $6.1 million heart-shaped gem is the most expensive gift in the year's edition of the annual Neiman Marcus Christmas Book.The Dallas-based department store unveiled its holiday catalog, which features the Mughal Heart Diamond and six other fantasy gifts. Designing the nearly 100-page book takes months of planning.“It takes over 2,000 hours of effort and big teams across the organization contributing,” explained Daz McColl, chief marketing officer at Neiman Marcus.Neiman Marcus released the...…Instead of a lump of coal, how would you like to find a 30.86-carat diamond in your stocking? The $6.1 million heart-shaped gem is the most expensive gift in the year's edition of the annual Neiman Marcus Christmas Book.The Dallas-based department store unveiled its holiday catalog, which features the Mughal Heart Diamond and six other fantasy gifts. Designing the nearly 100-page book takes months of planning.“It takes over 2,000 hours of effort and big teams across the organization contributing,” explained Daz McColl, chief marketing officer at Neiman Marcus.Neiman Marcus released the...WW…