Cut is not the only thing that affects diamond price, other factors such as the inherent quality of the rough diamond also affect price drastically.
Diamond Cut
The diamond cut is probably the most important of the four c's when one is considering the impact on visual performance. An excellent cut will increase a diamond's scintillation, fire and brilliance and this is why there is a premium charged but we believe it is a premium that is worth paying for the increased apperance.