Glamour is the watchword of the emerald cut, a rectangle with large, step-cut facets that create a bewitching ‘endless mirror’ effect inside the stone. The bold and geometric simplicity of this style really draws the eye to the gemstone, which will throw off sustained flashes of light rather than the delicate sparkle of more daintily facetted cuts. If you’d like an engagement ring that has a lengthening and slimming effect on the fingers, the emerald cut is ideal.