When purchasing a diamond, the illusion of size can be just as critical as carat weight. Perhaps the most frequent question asked is whether and to what extent an emerald diamond will appear larger than other shapes of diamonds of the same carat. The short answer is: yes, usually—it goes on.
Let’s explore why emerald-cut diamonds appear larger, how they differ from other popular cuts, and what to consider if size illusion is most important to you.
What Makes the Emerald Diamond Special?
The emerald cut is defined by its step-cut facets and rectangular form. In contrast to the brilliant cuts (e.g., princess or round), with numerous triangular facets to maximize brilliance, the emerald cut has long, unobstructed lines and an open table of large proportions. It creates a streamlined, elegant look—and makes the gemstone appear larger.
In fact, emerald cut diamonds possess one of the largest face-up diameters of any diamond cut, and therefore they reveal more of the diamond’s top view. The gem will therefore appear to be larger than an equal carat-weight round or cushion cut.
Face-Up Size Comparison by Diamond Shape
To better appreciate the actual view size of various diamond cuts, it is useful to compare their face-up size. For instance:
1.00 ct Round Brilliant: ~6.5 mm diameter
1.00 ct Emerald Cut: ~7.0 x 5.0 mm
1.00 ct Cushion Cut: ~5.5 x 5.5 mm
1.00 ct Oval Cut: ~7.7 x 5.7 mm
Notice how much wider and longer the emerald diamond is in relation to similarly weighted others. All of that added surface area is exposed diamond, and that creates an illusion that makes the gemstone appear larger.
Why Emerald Cut Diamonds Appear Larger
There are a few reasons that the emerald diamond will appear larger:
Shallow Depth
Emerald cuts typically have a shallower depth than brilliant cuts, meaning less weight is hidden below the surface. Greater weight of the diamond is directed upwards, resulting in the appearance of the diamond being larger.
Large Table and Slick Lines
The long, straight edges and large table of the emerald cut give an appearance of a mirror. The appearance of a mirror gives an impression of size as well as the dramatic beauty.
Ratio of Length-to-Width
Most emerald cut diamonds measure between 1.3 and 1.5 in length to width, so they will appear longer on the hand. Not only is this aesthetically pleasing, but it also fools the eye into perceiving that the stone is larger than it is.
Emerald vs. Other Diamond Cuts
This is how the emerald cut measures up to a few of the most commonly used shapes for size appearance:
Round Brilliant
Most common cut, but its deeper pavilion and symmetry push more weight below the surface, so it will look to be ever so slightly smaller face-up than comparable emeralds.
Princess Cut
Square-cut and highly brilliant, but it will look smaller face-up because of its deep cut.
Oval Cut
Similar to the emerald, the oval shape stretches out the finger and appears larger than round cuts. Its brilliant cutting does create some sort of glint that is different from emerald step-cuts.
Cushion Cut
The cushion cut is outdated and plushy but does consist of a more closed cut, i.e., a smaller face-up size than emeralds.
Things to Remember about Emerald Cuts
While emerald diamonds will look bigger than they are, they also more easily equate reflections with inclusions because they have a fine table and fewer facets. That means you should prioritize clarity when selecting an emerald cut—ideally VS2 or higher for a clean appearance.
Also, since emerald cuts are not as sparkling to the degree that brilliant cuts are brilliant, their beauty resides in their dignified shape and purity rather than deep brilliance or intense fire.
Is the Emerald Diamond for You?
If you are looking for a diamond that looks large, sits gracefully on the finger, and exudes vintage sophistication, an emerald diamond is a perfect choice. It is ideal for buyers who value understated elegance, clean lines, and the illusion of size without necessarily increasing carat weight.
Final thoughts
Emerald cut diamonds actually appear larger than most other cuts of equal weight. Because they are long, have a wide table, and are flat, they present a dramatic appearance without having to break out a bigger budget.
When choosing a diamond, don’t just glance at carat weight—consider how the cut influences appearance. Utilize this diamond cut guide to choose wisely, providing beauty, size, and style. And if elegance and presence are what you are after, the emerald cut may be your perfect solution.