The most popular cuts are the round brilliant, the princess cut, and the emerald cut. The round brilliant is the most popular cut because it is the most brilliant and sparkles the most. It is also the most expensive cut because it requires the most work to create. The emerald cut is less popular because it is not as brilliant, but it is cheaper to produce. The emerald cut also tends to show more flaws in the diamond than other cuts, so it is not as popular among those who are looking for a perfect diamond. The princess cut is a square cut with pointed corners and is often considered to be more modern and sleek than the traditional round cut. The princess cut is also said to make the diamond look larger, due to its unique shape.