THE 4 C’S
Title illustration of Carat section

Carat

The most obvious factor in determining a diamond's value is its size. However, two diamonds of the same size can have significantly different values because of the other C's explained in this guide. As with all precious gems, the weight or size of a diamond is measured in carats. For example, one carat is equal to 0.2 grams.

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When weighing a diamond, 1.00 carat is divided into 100 points; therefore, a diamond described as 25 points is 0.25 carat or a quarter of a carat. The larger the diamond, the more rare and valuable it is, resulting in a higher price per-carat. For example, a two-carat diamond is more than twice as valuable as a one-carat diamond of the same quality and characteristics. Importantly, a diamond’s weight is different from a diamond’s size. A well cut diamond will look larger and brighter.

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Cut

Cut refers to the proportions created when transforming a rough diamond into a polished diamond. Of the four C's, cut has the most influence on a diamond's brilliance, radiance and beauty. Round is the most brilliant shape and also has the most demanding cutting standards.

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When a diamond has been cut to ideal proportions by a master cutter, it will reflect light internally from one facet to another and release light. The better the cut, the more light is released through the top of the diamond rather than the bottom.

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Color

To the untrained eye, most gem-quality diamonds appear colorless. But there are actually minuscule differences in the color of the diamonds. These variations are the result of trace elements that have combined with carbon during the diamond’s billion-year formation. Truly colorless diamonds are the most rare and exquisite of them all.

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Title illustration of Clarity section

Clarity

While many diamonds are incredibly beautiful, no two are alike. Most diamonds have inclusions or blemishes, which are unique to each diamond. Inclusions are internal and can include crystals, feathers or lines that are generally not seen unless magnified. Blemishes are on the surface of the diamond.

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Clarity grades are determined by the size, color and location of inclusions. Diamonds with fewer, less visible inclusions receive higher grades, are more rare and have a greater value.

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The Zenith Cut™

Zenith cut illustration and measurements

The ZENITH CUT™ Engage’s exclusive AGS Ideal Cut diamond. It’s cut to ideal light performance, proportions, symmetry and polish, which means it reflects light better than any other cut you’ll find. It also looks larger than standard brilliant round cut diamonds because of its edge-to-edge brightness.

There is more brilliance in the ZENITH CUT™ diamonds as they reflect white light better. ZENITH CUT™ diamonds will look whiter than other diamonds as rays of light enter and exit on shorter paths and with greater intensity.

Diamond Shapes
Round diamond shape

Round

Cushion diamond shape

Cushion

Oval diamond shape

Oval

Princess diamond shape

Princess

Emerald diamond shape

Emerald

Radiant diamond shape

Radiant

Pear diamond shape

Pear

Asscher diamond shape

Asscher

Marquise diamond shape

Marquise

Heart diamond shape

Heart

Illustration of Round shape brilliant diamond Structure illustration of Round shape brilliant diamond

Round

The round brilliant diamond is by far the most popular diamond shape. Perhaps this is because the round brilliant diamond has the most sparkle of any of the shapes. The round diamond is often perceived to have a 'classic' style that complements almost any style of setting that it accompanies.

Illustration of Cushion shape brilliant diamond Structure illustration of Cushion shape brilliant diamond

Cushion

The cushion diamond features a square shape with rounded corners. They can vary in the length-to-width ratio with some being more elongated than others. The cushion diamond has experienced several refinements since its creation some 200 years ago, leading to a recent resurgence in popularity.

Illustration of Oval shape brilliant diamond Structure illustration of Oval shape brilliant diamond

Oval

The oval diamond is a modified round brilliant cut that offers a similar fire and brilliance as its more popular round diamond counterpart. For this reason, the oval diamond is a great option for those who are attracted to the round diamond's features but is looking for something a little more unique.

Illustration of Princess shape brilliant diamond Structure illustration of Princess shape brilliant diamond

Princess

The princess diamond, like the round brilliant diamond, is cut with a brilliant facet pattern, maximizing the sparkle in the gemstone. Although the length-to-width ratio can vary, princess diamonds are traditionally square in shape.

Illustration of Emerald shape brilliant diamond Structure illustration of Emerald shape brilliant diamond

Emerald

The emerald diamond, unlike the brilliant cuts mentioned above, is characterized by a step cut facet pattern. While emerald diamonds do not give off the same 'fiery' reflections as some of its counterparts, the step cut creates a mirror effect that reflects light in a dramatic way. Emerald diamonds are traditionally more elongated, but can also be cut to more of a square shape.

Illustration of Radiant shape brilliant diamond Structure illustration of Radiant shape brilliant diamond

Radiant

The radiant diamond can range in its length-to-width ratios with some being more square in shape and others being more elongated. With cropped corners and its brilliant facet pattern, the radiant diamond has characteristics similar to both the princess and cushion diamonds.

Illustration of Pear shape brilliant diamond Structure illustration of Pear shape brilliant diamond

Pear

The pear diamond is another modified brilliant cut that combines the looks of a round diamond and a marquise diamond. As its name suggests, the pear diamond features a round shape on one end and tapers to a point on the opposite end.

Illustration of Asscher shape brilliant diamond Structure illustration of Asscher shape brilliant diamond

Asscher

The Asscher diamond was first developed in 1902 by the Asscher family from Holland and experienced its peak popularity in the 1920's. For this reason, it is often perceived to have a 'vintage' style. With its square shape, cropped corners and more extreme step cut (than its emerald diamond cousin), the Asscher diamond has experienced a resurgence in popularity in recent years.

Illustration of Marquise shape brilliant diamond Structure illustration of Marquise shape brilliant diamond

Marquise

The marquise diamond is a modified brilliant cut with an oblong shape featuring two points on either end. With its long and narrow shape, the marquise diamond can make the wearer's finger appear longer and slimmer.

Illustration of Heart shape brilliant diamond Structure illustration of Heart shape brilliant diamond

Heart

The heart diamond is a modified brilliant cut that is obviously derived from the universal symbol of love. Symmetry is perhaps the most important quality to look for in a heart shaped diamond.