One of the best ways to make your diamond engagement ring affordable is to add a cushion halo around a round brilliant cut diamond. The cushion halo will create corners around the center diamond that did not exist at first in order to highlight the center diamond of your diamond solitaire engagement rings. This will also contribute to make the sparkling center diamond of your diamond engagement ring look bigger than its carat weight. You can also add a double or triple halo around the center diamond in order to get a more sophisticated look. This kind of design is perfect for those who are in awe of vintage diamond rings. Furthermore, use a thin and delicate diamond ring band in order to accentuate the main gemstone and to give an illusion of floating appearance to the ring.