On the Ski Slopes, Black Diamonds let you know that you are about to experience the most exhilarating ski-runs the mountain has to offer. At Parallel, “BD” (Black Diamonds) is used to mark only a few of the barrels of wine we produce. The 2009 Parallel Release of “Black Diamonds” Estate Cabernet was the beginning of a branding program that will recognize a Black Diamonds Ski run each coming year.