They say that the colors have emotional attributions to them. The color blue denotes intelligence, trust, and serenity, among others. The true science behind color and emotion is complicated, but most can agree that blue is one of the most dominant colors. This is particularly true when it comes to diamonds.
It is a known fact that natural fancy blue diamonds are among the rarest, most beautiful, and sought after stones worldwide. Additionally, blue stones with favorable overtones, deep saturation, crystal clarity, and exquisite craftsmanship are on a whole other level, appearing once in a blue moon.