The diamond cutter you really need is one that is designed to provide you with the highest quality cut possible. It should be made of durable materials that can withstand the rigors of cutting diamonds. It should also have a sharp blade that is designed to cut through the toughest of diamonds. The handle should be comfortable to hold and the blade should be adjustable to ensure the perfect cut. The diamond cutter should also have a safety guard to protect your hands from any accidental cuts. Additionally, the diamond cutter should have a dust collection system to keep your workspace clean and free of debris. Finally, the diamond cutter should come with a warranty to ensure that it will last for years to come. With the right diamond cutter, you can be sure that you will get the perfect cut every time.