Cut

As with white diamonds, the better the cut, the higher the price. However, with colored diamonds, price is determined by an additional factor – the labor cost of matching the colors in similar-cut diamonds. Two diamonds might have the same body color when seen through the pavilion, but when seen face-up, if one has a shallower crown angle, it will look darker than the other. Wide variances in proportions across colored diamonds will make them harder to match them face-up – incurring a higher cost of labor. This is especially an issue in smaller sizes when a larger number of pieces need to be matched.