The classic gem shape. As you can see in our Diamond Trends, more engagement rings are created with round diamonds than any other shape — and by a wide margin. There's a very good reason it's the most popular shape. The 58-facet, round diamond was created in pursuit of the maximum sparkle a diamond can create — no diamond shape has more sparkle.View round diamonds
A vintage cut with lots of romantic appeal, the cushion cut diamond has become very popular in recent years. A blend of the modern round brilliant and the Old Mine facet pattern, they are also often called Pillow cut diamonds. This refers to their curved angles and soft, square shape. For the optimal length-to-width ratio of a square cushion, we suggest a diamond between 1.00 and 1.09 times as long as it is wide. For a more rectangular cushion, opt for a diamond between 1.15 to 1.5 times as long as the width.View cushion diamonds
A striking blend of sharp angles and brilliant sparkle, the princess cut is a contemporary classic. Cut with a brilliant facet pattern – similar to the round – they are shaped for brilliance, but with a stylish square silhouette. For a square princess cut diamond, look for those with a length to width ratio of between 1.00 and 1.09.View princess diamonds
Also called a "step-cut" because the flat facets in the base and the crown corners resemble steps. The emerald-cut diamond has a very symmetrical, organized sparkle. Because the cut tends to allow for more visibility inside the diamond, choose a higher color and clarity grade if you're choosing an emerald cut. For the optimal length-to-width ratio, we suggest a diamond between 1.25 to 1.5 times as long as it is high.View emerald diamonds
The symmetrical shape and corner cuts in the base, or pavilion, create an alluring "X" effect within the square-shaped diamond. Created in 1902, this cut gets its name from its inventor, renowned jeweler Joseph Asscher of Europe. The Asscher-cut has gained popularity recently as the diamond-cut of the stars. Many actors and celebrities have chosen Asscher-cut diamonds in their engagement rings.View Asscher diamonds
The beautiful pear-shaped diamond resembles a sparkling pure drop of water. Whether worn with the point facing up or down, the pear-shaped diamond fits in most settings designed for a round diamond to create a uniquely beautiful look. For the optimal length-to-width ratio, we suggest a diamond between 1.5 to 2 times as long as it is high.View pear diamonds
The elongated shape of the marquise originated when King Louis XIV commissioned a diamond of this shape to resemble a smile. The pointed ends and rounded sides give it a unique combination of angles and curves. For the optimal length-to-width ratio, we suggest a diamond between 1.5 to 2.5 times as long as it is high.View marquise diamonds
The oval is a variation of the round brilliant shape. Its shape lends a lengthening effect which can accentuate beautifully long fingers, or make shorter fingers appear longer. This is a great shape choice for someone who loves the brilliance of a round, but wants something more unique. For the optimal length-to-width ratio, we suggest a diamond between 1.25 to 1.75 times as long as it is high.View oval diamonds
The radiant-cut diamond combines the elegant symmetry of an emerald with the brilliant sparkle of a round. In order to produce the most sparkle, well-cut radiant diamonds are traditionally deeper in the base, or pavilion, than other diamond shapes. For the optimal length-to-width ratio of a square radiant, we suggest a diamond between 1.00 and 1.09 times as long as it is high. For the optimal length-to-width ratio of a rectangular radiant, we suggest a diamond between 1.15 to 1.5 times as long as it is high.View radiant diamonds
Find out how to recognize a diamond with the most sparkle using the four Cs of diamond quality.Learn about diamonds
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