What are the Different Lab-Grown Diamond Shapes and Which One is Best?

Man inspecting a rough diamond and planning suitable cuts

There are many different lab-grown diamond shapes available on the market today. Some are more popular than others, but they all serve a specific purpose. Thinking about buying a lab-grown diamond? Then you should know that the cut is one of the most critical factors regarding value and appearance. 


Several factors determine how a lab-grown diamond is cut, including its outline, proportions, symmetry, and finish. The cut also affects the light performance of a lab-grown diamond by restricting or redirecting light in different ways when it enters and exits the stone.


Every type of lab-grown diamond cut has various benefits for appearance and visual performance. Here’s your guide to understanding those cuts and how they affect you as a buyer.

Diamond cut diagram - Gemological Institute of America

What Is The Most Important Factor When Choosing A Lab-Grown Diamond?


Before choosing a lab-grown diamond, you should first consider its cut. While the 4Cs are all important, cut is the most important factor when it comes to a lab-grown diamond’s value. This is because the cut is the most controllable aspect of a lab-grown diamond’s make-up. The cut has a significant impact on the lab-grown diamond’s visual appeal, brightness, and price. A poorly cut lab-grown diamond will have a dull appearance and less brilliance than its well-cut counterpart. When light enters and exits a lab-grown diamond, it also has to go through the table and bezel. A poorly cut lab-grown diamond will have an incomplete table and bezel, which will restrict the light flow. A lab-grown diamond’s cut grade is determined by how well its cut meets industry standards for each specific cut.

Machine polishing a cut diamond
Gemological Institute of America​​

The Importance Of Lab-Grown Diamond Shapes


There are mainly nine shapes: Round Brilliant, Emerald, Princess, Square, Asscher, Marquise, Heart, and Radiant. The cut grade is determined by how close the cut of the lab-grown diamond comes to the ideal proportions. While the proportions of the lab-grown diamond are essential, it is also important to note that no two gemstones are exactly the same. The perfect proportions of a lab-grown diamond are what makes it rare and valuable. Also, different cuts are better at specific things, so keep that in mind when choosing an amount.

Various diamond cuts

Round Brilliant Cut


The round brilliant cut is the most popular cut for a reason. It is a classic, timeless shape with a modern feel. A round brilliant cut lab-grown diamond has 57 or 58 facets. The cut of the lab-grown diamond is crucial because it determines how the stone interacts with light. A round brilliant cut lab-grown diamond has a long history of being incredibly popular. It is the most common shape and is especially popular for engagement rings. The round brilliant cut is one of the best for a lab-grown diamond set in a ring. Round brilliant cuts are generally larger than other cuts, so they are a good choice if you’re looking for something extra special.

Round brilliant cut diamond

Round Cut Selections

Emerald Cut


The emerald cut dates back to the Victorian era when it was used as an alternative cut for the marquise cut. It is a square-shaped lab-grown diamond with pointed corners. Emerald cuts are rare and usually only found in tiny lab-grown diamonds. It is an excellent option for solitaire pieces that are meant to be more discreet. The emerald-cut lab-grown diamond has a huge table, which makes it easier to set in rings. The emerald-cut lab-grown diamond also has a lot of facets, so it has high refraction and excellent brilliance. It is an ancient cut, but it has recently made a comeback – especially with solitaire pieces. It is an excellent alternative to the traditional round cut.

Emerald cut diamond

Emerald Cut Selections

Pear Cut


The pear cut is similar to the emerald cut. It’s not as common as the other cuts, but it’s an excellent and unique shape that works well for lab-grown diamonds. The pear cut has a lot of volume on the bottom and a narrow top. It’s best suited for pear-shaped lab-grown diamonds but can also work for some of the round ones. It’s not an excellent choice for engagement rings since it’s not a traditional style and can make a lab-grown diamond look smaller. Pear cuts are best suited for earrings, pendants, and other types of jewelry. They have a narrow top but an ample bottom that maximizes carat weight.

Pear cut diamond

Pear Cut Selections

Asscher Cut


The Asscher cut is a square-shaped lab-grown diamond with clean lines. The Asscher cut is named after the person who created it, the world-renowned Dutch diamond cutter Joseph Asscher. Asscher cuts are very rare and only used in larger lab-grown diamonds. The Asscher cut has a large table and many facets, making it sparkly. It is best suited for larger lab-grown diamonds or solitaire pieces with a simplistic design. The Asscher cut is an infrequent cut often sought after by collectors.

Asscher cut diamond

Asscher Cut Selections

Marquise Cut


The marquise cut is a long, narrow lab-grown diamond with pointed ends. It is one of the rarer cuts and is usually only used in large or fancy lab-grown diamonds. The marquise cut has a large table and many facets, making it sparkly. It is best suited for large lab-grown diamonds or solitaire pieces with a simplistic design. It is a good choice if you’re looking for something long, sparkly, and fancy.

Marquise cut diamond

Marquise Cut Selections

Summing Things Up


There are also many factors you should consider when looking for a lab-grown diamond, including carat weight, clarity, color, and most importantly, the cut. 


The cut determines how a lab-grown diamond interacts with light and impacts its price. There are nine different cuts: round brilliant, emerald, princess, square, asscher, marquise, heart, and radiant. The cut grade is determined by how close the cut of the lab-grown diamond comes to the ideal proportions. While the proportions of the lab-grown diamond are important, it is also important to note that no two gemstones are exactly the same. The ideal proportions of a lab-grown diamond are what make it rare and valuable.