In terms of brilliance and sparkle, oval diamonds are extremely comparable to round diamonds. An oval, on the other hand, has a naturally extended shape that makes it appear larger on the finger. Assume you can't decide between a 2 ct. round diamond and a 2 ct. oval diamond. They may be the same carat weight, but the oval diamond will take up more space on the ring finger due to its elongated shape. Oval diamonds may be the most expensive shape on the market right now, but they're a safe and wise investment because you'll receive the most bang for your buck.