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A brilliant-cut round diamond is the most popular engagement ring shape. It has 58 light-reflecting facets, giving this classic engagement stone unmatched sparkle. Round diamonds are typically the most expensive.

Cushion-cut diamonds are square-shaped with slightly rounded edges, placing them between round and princess cuts. They are commonly referred to mimicking the shape of a plump pillow. They are the modern variation of the Old Mine cut, popular during the 18th and 19th centuries. Depending on how it’s cut, this diamond can either be a square or a rectangle in shape.

The oval cut is a modification of the brilliant round diamond cut. It is reminiscent of the stones often seen in Victorian-era jewelry and will give your engagement ring a slightly vintage look. It is just as brilliant as the round cut but more affordable. Its elongated shape can also create the illusion of a larger diamond as it takes up more real estate on a finger.

Joseph Asscher developed this diamond shape in 1902. Like the emerald-cut diamonds, Asscher-cut diamonds use the step-cutting technique. They are square with diagonal corners, creating the same hall-of-mirrors effect as emerald-cut stones.

Like the round and oval cuts, a pear-cut diamond has 58 facets, giving it exceptional sparkle. It combines brilliant round and marquise shapes with one pointed end that you can wear in either direction. Pear-cut engagement rings are known for making the fingers appear longer.

The newest of all the diamond shapes, the radiant cut combines the silhouette of an emerald-shaped stone with the sparkle of a brilliant cut. It is rectangular with cropped corners and 70 light-reflecting facets. This shape is angular and dazzling, perfect for luxurious contemporary engagement rings.

This elegant gemstone shape is another brilliant-cut modification with slightly pointed ends. The football-shaped stone has a large surface area with 56 facets. Originating in the 18th century, the shape of this stone allows diamond cutters to retain more of the rough stone which can lend itself to being less expensive than other shapes.

Throughout the history of diamonds, gem cutters have tried to maximize sparkle by increasing light refraction inside the stone. The Old European cut is the precursor to the modern brilliant round. This shape was popular between 1890 and 1930 and is slightly longer with larger facets than today’s round-cut diamonds.

Emerald-shaped diamonds are step-cut, meaning they have rectangular facets along all four sides of the stone. They sparkle differently from brilliant-cut diamonds because the parallel facets create a “hall of mirrors” effect. However, this cut can highlight imperfections and is only suitable for stones graded high in clarity.

Also known as the trillion cut, this shape is a triangular brilliant-cut diamond with three sharp edges. The three corners come to sharp points, often making it appear larger than its carat weight. Trillion-cut diamonds are more common as accent stones in engagement rings.

The princess cut is the square version of the brilliant round cut. The sharp corners, crisp symmetry, and brilliant sparkle give this cut a contemporary look and feel. The princess cut holds more of its carat weight in the body of the stone in order to magnify its brilliance. Having said that, it therefore will appear smaller than other diamond shapes of the same carat weight.