Diamonds Education

Oval Cut Diamonds Spotlight

If you love the brilliance and sparkle of round, brilliant cut diamonds but are seeking a more unique diamond shape for your engagement ring, an oval cut diamond may offer the perfect solution. Offering much of the same radiance and fire as the round, the oval cut diamond’s elongated shape flatters the wearer’s hand by creating the illusion of longer, more slender fingers.

Lazar Kaplan, founder of the premier diamond-cutting company LKI, first introduced the oval cut diamond to the jewelry industry. In creating the cut, Lazar utilized the formulas and proportions of Marcel Toklowsky, a mathematician who developed algorithms and “ideal” proportions for optimizing the brilliance and sparkle of round brilliant cut diamonds. Lazar applied the benchmarks and standards outlined in Tolkowsky’s 1919 publication The American Ideal Cut to irregular shaped diamonds, perfecting the oval cut in 1960.

With a brilliant cut diamond, the amount of light reflecting back to the surface (also known as its “brilliance”) is determined by the stone’s proportions, facet uniformity, polish, and symmetry. Toklowsky’s “ideal” proportions reflect all light back to the surface, with none escaping through the stone’s sides or bottom.

The length to width ratio is an important factor to consider when shopping for a loose oval diamond. For this shape, an optimal length to width ratio should be between 1.3 and 1.65. Because of the stone’s elongated shape, inclusions and impurities are easier to spot in oval cut diamonds than in rounds, so color and clarity are of paramount importance. A certified diamond certainly doesn’t have to be “flawless” or “colorless” to be beautiful, and if the stone is well-cut, the appearance of any flaws should be minimal to the naked eye.

Due to its elongated shape, the oval cut diamond has larger facets than a round cut diamond in its pavilion. These facets sometimes create what’s known as a “bow tie” effect (a dark area in the shape of a man’s bow tie). Though it’s not uncommon for a bow tie to be present in an oval cut diamond, the effect should not detract from the diamond’s brilliance.

When evaluating an oval cut and round cut diamond of the same carat weight, the oval cut diamond will have a larger surface area and appear bigger than its round counterpart. So, if diamond size is important, the oval cut diamond is an excellent option, offering the look of a bigger stone for your money.

The brilliance, sparkle, and elegant shape of the oval cut diamond have led to its increase in popularity over the last several decades. If you’re still undecided about which diamond to choose, consult a Brilliance certified diamond experts at 1-866-737-0754.