Oval cut diamonds have many facets giving them a similar brilliance to the traditional round stone, albeit with a more unusual shape. You can choose the oval from the various elongated options available by selecting the stone according to the length-to-width ratio.
This diamond shape from Hatton Jewels will certainly give you plenty of sparkle no matter what oval you go for. Always bear in mind that traditional oval diamonds have a ratio of 1.5:1.0 where the length of the stone is about 1.5 times the width. So if you decide on a design that places the oval stone along the finger, a higher ratio is considered to be more flattering because it has a lengthening effect on the hand.