No, now not all oval-Cut diamonds are the equal shape. whilst oval-cut diamonds share a standard oval shape, there can be variations of their proportions and average appearance. The form of an oval-cut diamond is determined by using the period-to-width ratio, that's the ratio of the diamond's period to its width. This ratio can vary, and it considerably affects the diamond's appearance. as an instance, some oval-Cut diamonds may have a greater elongated shape with a higher duration-to-width ratio, making them look longer and narrower.