Good color is no Color. However, the best color for a diamond is no color. It is a totally colorless diamond that allows white light to pass effortlessly through it and be dispersed as rainbows of color. And to give a woman such a diamond is to show your true colors, as well. And then there's a Cut.
Many people confuse cut with the shape of the diamond.
Diamonds are cut into a number of shapes, depending on the nature of the rough stone. The most popular are round, marquise, oval, pear, heart, and emerald, and the choice is largely a matter of personal preference. Whatever the shape, however, a well-cut diamond is the work of a master diamond cutter. When cut to good proportions, the diamond is better able to handle light, creating more scintillation, more sparkle. It is the cut that enables a diamond to make the best use of light.