When you invest in diamond jewellery, you need the gem you choose to make an impression. The shape a diamond is cut into has a huge impact on how the diamond looks when it is set into a ring or other fine jewellery. All Diamond's jewellery experts have created a series of guides to help you to make the perfect choice of diamond. You'll learn which diamond shape is the most popular. Which diamonds work best in pendants and earrings? We will show you! Why is a round diamond an excellent choice for an engagement ring? That and more is in our expert diamond guides. Click on the images below to find out all about diamond shapes.