Your eyes do not deceive you: These Harry Winston diamond drops feature one fancy intense blue and one fancy intense yellowish orange ­diamond. And they are not as rare as you might think. This is the fourth magnificently mismatched set of ear pendants Christie’s has sold in the past three years; one pair fetched nearly $1.5 million. “The rarest colored ­diamonds now command more per carat than colorless diamonds,” explains Daphne Lingon, senior vice president of jewelry for ­Christie’s Americas. The platinum-set earrings—“a classic Harry Winston cluster design,” Lingon says�